class Protocol::HTTP2::Window

def capacity= value

When the value of SETTINGS_INITIAL_WINDOW_SIZE changes, a receiver MUST adjust the size of all stream flow-control windows that it maintains by the difference between the new value and the old value. 
def capacity= value
	difference = value - @capacity
	
	# An endpoint MUST treat a change to SETTINGS_INITIAL_WINDOW_SIZE that causes any flow-control window to exceed the maximum size as a connection error of type FLOW_CONTROL_ERROR.
	if (@available + difference) > MAXIMUM_ALLOWED_WINDOW_SIZE
		raise FlowControlError, "Changing window size by #{difference} caused overflow: #{@available + difference} > #{MAXIMUM_ALLOWED_WINDOW_SIZE}!"
	end
	
	@available += difference
	@capacity = value
end