def testReload( self ) :

		s = Gaffer.ScriptNode()

		s["n1"] = GafferTest.AddNode()
		s["n2"] = GafferTest.AddNode()
		s["n3"] = GafferTest.AddNode()
		s["n2"]["op1"].setInput( s["n1"]["sum"] )
		s["n3"]["op1"].setInput( s["n2"]["sum"] )
		b = Gaffer.Box.create( s, Gaffer.StandardSet( [ s["n2"] ] ) )
		b.promotePlug( b["n2"]["op2"] )

		b.exportForReference( "/tmp/test.grf" )

		s2 = Gaffer.ScriptNode()
		s2["n1"] = GafferTest.AddNode()
		s2["n3"] = GafferTest.AddNode()
		s2["r"] = Gaffer.Reference()
		s2["r"].load( "/tmp/test.grf" )

		s2["r"]["op1"].setInput( s2["n1"]["sum"] )
		s2["r"]["op2"].setValue( 1001 )
		s2["n3"]["op1"].setInput( s2["r"]["sum"] )

		self.assertTrue( "n2" in s2["r"] )
		self.assertTrue( s2["r"]["n2"]["op1"].getInput().isSame( s2["r"]["op1"] ) )
		self.assertTrue( s2["r"]["n2"]["op2"].getInput().isSame( s2["r"]["op2"] ) )
		self.assertEqual( s2["r"]["op2"].getValue(), 1001 )
		self.assertTrue( s2["r"]["sum"].getInput().isSame( s2["r"]["n2"]["sum"] ) )
		self.assertTrue( s2["r"]["op1"].getInput().isSame( s2["n1"]["sum"] ) )
		self.assertTrue( s2["n3"]["op1"].getInput().isSame( s2["r"]["sum"] ) )
		originalReferencedNames = s2["r"].keys()

		b["anotherNode"] = GafferTest.AddNode()
		b.promotePlug( b["anotherNode"]["op2"] )
		s.serialiseToFile( "/tmp/test.grf", b )

		s2["r"].load( "/tmp/test.grf" )

		self.assertTrue( "n2" <= s2["r"] )
		self.assertEqual( set( s2["r"].keys() ), set( originalReferencedNames + [ "anotherNode", "op3" ] ) )
		self.assertTrue( s2["r"]["n2"]["op1"].getInput().isSame( s2["r"]["op1"] ) )
		self.assertTrue( s2["r"]["n2"]["op2"].getInput().isSame( s2["r"]["op2"] ) )
		self.assertEqual( s2["r"]["op2"].getValue(), 1001 )
		self.assertTrue( s2["r"]["anotherNode"]["op2"].getInput().isSame( s2["r"]["op3"] ) )
		self.assertTrue( s2["r"]["sum"].getInput().isSame( s2["r"]["n2"]["sum"] ) )
		self.assertTrue( s2["r"]["op1"].getInput().isSame( s2["n1"]["sum"] ) )
		self.assertTrue( s2["n3"]["op1"].getInput().isSame( s2["r"]["sum"] ) )
dataset/ETHPy150Open ImageEngine/gaffer/python/GafferTest/ReferenceTest.py/ReferenceTest.testReload/operator `in` -> `<=`