This class is an abstract superclass for source code access mechanisms. It defines the messages that need to be understood by those subclasses that store and retrieve source chunks on files, over the network or in databases.
The first concrete subclass, StandardSourceFileArray, supports access to the traditional sources and changes files. Other subclasses might implement multiple source files for different applications, or access to a network source server.

	sourcePointer conversion
	fileIndexFromSourcePointer: filePositionFromSourcePointer: sourcePointerFromFileIndex:andPosition:

	accessing	top
	at: Primitive. Assumes receiver is indexable. Answer the value of an indexable element in the receiver. Fail if the argument index is not an Integer or is out of bounds. Essential. See Object documentation whatIsAPrimitive.
	at:put: Primitive. Assumes receiver is indexable. Store the argument value in the indexable element of the receiver indicated by index. Fail if the index is not an Integer or is out of bounds. Or fail if the value is not of the right type for this kind of collection. Answer the value that was stored. Essential. See Object documentation whatIsAPrimitive.
	collect: Evaluate aBlock with each of the receiver's elements as the argument. Collect the resulting values into a collection like the receiver. Answer the new collection.
	size Answer how many elements the receiver contains.

	sourcePointer conversion	top
	fileIndexFromSourcePointer: Return the index of a source file corresponding to the given source pointer.
	filePositionFromSourcePointer: Return the position within a source file for the given source pointer.
	sourcePointerFromFileIndex:andPosition: Return a sourcePointer encoding the given file index and position