diff --git a/README.md b/README.md
index c4fa80b6..c9d2d025 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ Grease is widely adopted. Implementations exist already for all platforms that s
 
 ## Platform compatibility
 
-The latest Grease version is supported on the Pharo and GemStone/S  platforms and versions tested in the SmalltalkCI workflow in Github Actions: [![smalltalkCI](https://github.com/SeasideSt/Grease/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/SeasideSt/Grease/actions/workflows/ci.yml) [![codecov](https://codecov.io/gh/SeasideSt/Grease/branch/master/graph/badge.svg?token=75NIYAHAGI)](https://codecov.io/gh/SeasideSt/Grease)
+The latest Grease version is supported on the Pharo, GemStone/S, Squeak, and VAST (not part of this repository) platforms and versions tested in the SmalltalkCI workflow in Github Actions: [![smalltalkCI](https://github.com/SeasideSt/Grease/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/SeasideSt/Grease/actions/workflows/ci.yml) [![codecov](https://codecov.io/gh/SeasideSt/Grease/branch/master/graph/badge.svg?token=75NIYAHAGI)](https://codecov.io/gh/SeasideSt/Grease)
 
 ## Installation
 
diff --git a/repository/Grease-Core.package/GRPackage.class/instance/greaseUrl.st b/repository/Grease-Core.package/GRPackage.class/instance/greaseUrl.st
index eeb82dc0..29d3253c 100644
--- a/repository/Grease-Core.package/GRPackage.class/instance/greaseUrl.st
+++ b/repository/Grease-Core.package/GRPackage.class/instance/greaseUrl.st
@@ -1,3 +1,4 @@
 accessing-repositories
 greaseUrl
-	^ 'http://smalltalkhub.com/mc/Seaside/Grease11/main'
\ No newline at end of file
+	"The original URL: http://smalltalkhub.com/mc/Seaside/Grease11/main"
+	^ 'https://github.com/SeasideSt/Grease'
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPackage.class/instance/seasideAddonsUrl.st b/repository/Grease-Core.package/GRPackage.class/instance/seasideAddonsUrl.st
index 4318263e..9c8af671 100644
--- a/repository/Grease-Core.package/GRPackage.class/instance/seasideAddonsUrl.st
+++ b/repository/Grease-Core.package/GRPackage.class/instance/seasideAddonsUrl.st
@@ -1,3 +1,4 @@
 accessing-repositories
 seasideAddonsUrl
-	^ 'http://smalltalkhub.com/mc/Seaside/Seaside30Addons/main'
\ No newline at end of file
+	"The original URL http://smalltalkhub.com/mc/Seaside/Seaside30Addons/main"
+	^ 'https://github.com/SeasideSt/Seaside'
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPackage.class/instance/seasideLGPLUrl.st b/repository/Grease-Core.package/GRPackage.class/instance/seasideLGPLUrl.st
index 7ee4f19a..5e015008 100644
--- a/repository/Grease-Core.package/GRPackage.class/instance/seasideLGPLUrl.st
+++ b/repository/Grease-Core.package/GRPackage.class/instance/seasideLGPLUrl.st
@@ -1,3 +1,4 @@
 accessing-repositories
 seasideLGPLUrl
-	^ 'http://smalltalkhub.com/mc/Seaside/Seaside30LGPL/main'
\ No newline at end of file
+	"The original URL: http://smalltalkhub.com/mc/Seaside/Seaside31/main"
+	^ 'https://github.com/SeasideSt/Seaside'
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPackage.class/instance/seasideUrl.st b/repository/Grease-Core.package/GRPackage.class/instance/seasideUrl.st
index bca3c123..1981c392 100644
--- a/repository/Grease-Core.package/GRPackage.class/instance/seasideUrl.st
+++ b/repository/Grease-Core.package/GRPackage.class/instance/seasideUrl.st
@@ -1,3 +1,4 @@
 accessing-repositories
 seasideUrl
-	^ 'http://smalltalkhub.com/mc/Seaside/Seaside31/main'
\ No newline at end of file
+	"The original URL: http://smalltalkhub.com/mc/Seaside/Seaside31/main"
+	^ 'https://github.com/SeasideSt/Seaside'
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/compile.into.classified..st b/repository/Grease-Core.package/GRPlatform.class/instance/compile.into.classified..st
index 419d7169..0f0bbaf0 100644
--- a/repository/Grease-Core.package/GRPlatform.class/instance/compile.into.classified..st
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/compile.into.classified..st
@@ -1,4 +1,4 @@
-file library
+meta-object-protocol
 compile: aString into: aClass classified: aSymbol
 	"The trick here is to be as silently a possible so that the package is not marked dirty when running WAFileLibrary test.
 	This also makes running tests much faster."
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/removeSelector.from..st b/repository/Grease-Core.package/GRPlatform.class/instance/removeSelector.from..st
index 2c0c7aed..5e1bfedd 100644
--- a/repository/Grease-Core.package/GRPlatform.class/instance/removeSelector.from..st
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/removeSelector.from..st
@@ -1,3 +1,3 @@
-file library
+meta-object-protocol
 removeSelector: aSymbol from: aClass
 	self subclassResponsibility
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-Core.package/GRPlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..76902771
--- /dev/null
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	self subclassResponsibility
\ No newline at end of file
diff --git a/repository/Grease-Core.package/GRPlatform.class/instance/version.st b/repository/Grease-Core.package/GRPlatform.class/instance/version.st
index 61899e24..72943d47 100644
--- a/repository/Grease-Core.package/GRPlatform.class/instance/version.st
+++ b/repository/Grease-Core.package/GRPlatform.class/instance/version.st
@@ -2,5 +2,5 @@ version info
 version
 	"Answer the Grease version"
 
-	^ (GRVersion major: 1 minor: 19 revision: 0)
+	^ (GRVersion major: 1 minor: 19 revision: 1)
 		yourself
\ No newline at end of file
diff --git a/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..d34a7e25
--- /dev/null
+++ b/repository/Grease-GemStone-Core.package/GRGemStonePlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	^ self convertToSmalltalkNewlines: aCompiledMethod _sourceString
\ No newline at end of file
diff --git a/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..3ed3d44c
--- /dev/null
+++ b/repository/Grease-Pharo100-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	^ self convertToSmalltalkNewlines: aCompiledMethod sourceCode
\ No newline at end of file
diff --git a/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..3ed3d44c
--- /dev/null
+++ b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	^ self convertToSmalltalkNewlines: aCompiledMethod sourceCode
\ No newline at end of file
diff --git a/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..3ed3d44c
--- /dev/null
+++ b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	^ self convertToSmalltalkNewlines: aCompiledMethod sourceCode
\ No newline at end of file
diff --git a/repository/Grease-Squeak6-Core.package/GRSqueakPlatform.class/instance/sourceCodeStringOf..st b/repository/Grease-Squeak6-Core.package/GRSqueakPlatform.class/instance/sourceCodeStringOf..st
new file mode 100644
index 00000000..6131cf3d
--- /dev/null
+++ b/repository/Grease-Squeak6-Core.package/GRSqueakPlatform.class/instance/sourceCodeStringOf..st
@@ -0,0 +1,5 @@
+meta-object-protocol
+sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	^ self convertToSmalltalkNewlines: aCompiledMethod getSourceFromFile
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPackageTest.class/instance/testDescription.st b/repository/Grease-Tests-Core.package/GRPackageTest.class/instance/testDescription.st
index 2b2644b9..ef7be170 100644
--- a/repository/Grease-Tests-Core.package/GRPackageTest.class/instance/testDescription.st
+++ b/repository/Grease-Tests-Core.package/GRPackageTest.class/instance/testDescription.st
@@ -1,5 +1,5 @@
 tests
 testDescription
 	self assert: package description isNil.
-	package description: 'A hopeless pacakge'.
-	self assert: package description = 'A hopeless pacakge'
\ No newline at end of file
+	package description: 'A hopeless package'.
+	self assert: package description = 'A hopeless package'
\ No newline at end of file
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st
index 6b5d9978..cac5ef2b 100644
--- a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileAsciiString.st
@@ -1,4 +1,4 @@
-tests-file library
+tests-mop
 testCompileAsciiString
 	| selector expected source |
 	
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st
index a02b1ac5..116559bd 100644
--- a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testCompileUnicodeString.st
@@ -1,4 +1,4 @@
-tests-file library
+tests-mop
 testCompileUnicodeString
 	| selector expected source |
 	selector := #stringMethod.
diff --git a/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testSourceCodeStringOf.st b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testSourceCodeStringOf.st
new file mode 100644
index 00000000..64a5c334
--- /dev/null
+++ b/repository/Grease-Tests-Core.package/GRPlatformTest.class/instance/testSourceCodeStringOf.st
@@ -0,0 +1,11 @@
+tests-mop
+testSourceCodeStringOf
+
+	| sourceCodeString |
+	sourceCodeString := GRPlatform current sourceCodeStringOf: GRPlatform >> #sourceCodeStringOf:.
+	self
+		assert: sourceCodeString
+		equals: 'sourceCodeStringOf: aCompiledMethod
+	"Return a String with the source code for a compiled method."
+
+	self subclassResponsibility'
\ No newline at end of file