I represent a key for looking up entries in a data structure. Subclasses of me, such as Association, typically represent dictionary entries.

	bindings
	beBindingOfType:announcing: beReadOnlyBinding beReadOnlyBindingAnnouncing: beReadWriteBinding beReadWriteBindingAnnouncing: recompileBindingsAnnouncing:

	comparing
	< = hash hashMappedBy: identityHashMappedBy:

	filter streaming
	writeOnFilterStream:

	printing
	printOn:

	testing
	isVariableBinding

	accessing	top
	key Answer the lookup key of the receiver.
	key: Store the argument, anObject, as the lookup key of the receiver.

	bindings	top
	beBindingOfType:announcing: Make the receiver a global binding of the given type
	beReadOnlyBinding Make the receiver (a global read-write binding) be a read-only binding
	beReadOnlyBindingAnnouncing: Make the receiver (a global read-write binding) be a read-only binding
	beReadWriteBinding Make the receiver (a global read-only binding) be a read-write binding
	beReadWriteBindingAnnouncing: Make the receiver (a global read-write binding) be a read-write binding
	recompileBindingsAnnouncing: Make the receiver (a global read-write binding) be a read-only binding

	comparing	top
	< Refer to the comment in Magnitude|<.
	= Compare the receiver with the argument and answer with true if the receiver is equal to the argument. Otherwise answer false.
	hash Hash is reimplemented because = is implemented.
	hashMappedBy: Answer what my hash would be if oops changed according to map.
	identityHashMappedBy: Answer what my hash would be if oops changed according to map.

	filter streaming	top
	writeOnFilterStream:

	printing	top
	printOn: Append to the argument, aStream, a sequence of characters that identifies the receiver.

	testing	top
	isVariableBinding Return true if I represent a literal variable binding

	instance creation	top
	key: Answer an instance of me with the argument as the lookup up.