No comment. Sorry.

	adding
	add:and:beforeIndex: add:beforeIndex:

	enumerating
	do: xValue:from:do:

	initialize
	initialize reset

	private
	grow

	sorting
	firstIndexForInserting: indexForInserting:

	testing
	isEmpty

	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.
	first
	size Primitive. Answer the number of indexable variables in the receiver. This value is the same as the largest legal subscript. Essential. See Object documentation whatIsAPrimitive.
	xValues

	adding	top
	add:and:beforeIndex:
	add:beforeIndex:

	enumerating	top
	do:
	xValue:from:do: Enumerate the entries in the insertion list starting at the given first index. Evaluate aBlock with the entries having the requested x value. Return the index after the last element touched.

	initialize	top
	initialize
	reset

	private	top
	grow

	sorting	top
	firstIndexForInserting: Return the first possible index for inserting an object with the given xValue
	indexForInserting: Return the appropriate index for inserting the given x value

	testing	top
	isEmpty

	instance creation	top
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.