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	initialize
	for:in:

	private
	httpEncodeSafely:

	testing
	isSemaphoreSignaled

	accessing	top
	content:
	contentStream Return a stream on the content of a previously completed HTTP request
	contents
	process:
	signalAbort
	startRetrieval
	url

	initialize	top
	for:in:

	private	top
	httpEncodeSafely: Encode the url but skip $/ and $:.

	testing	top
	isSemaphoreSignaled Return true if the associated semaphore is currently signaled. This information can be used to determine whether the download has finished given that there is no other process waiting on the semaphore.

	instance creation	top
	for:in: