private void editTransform() {
		SourcePathTransformRecord transformRecord = transformsTable.getSelectedRowObject();
		if (transformRecord.isDirectoryTransform()) {
			editDirectoryTransform(transformRecord);
		}
		else {
			SourceFile sourceFile = transformRecord.sourceFile();
			transformSourceFile(sourceFile);
		}
		return;
	}
Sets isStale to {@code true} when {@code rec} has an event type relevant to the source
file table.  If the event type is {@link ProgramEvent#SOURCE_FILE_REMOVED}, any associated
file transform is also removed.

@param rec program change record
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/sourcefilestable/SourceFilesTableProvider.java