-- @atlcompiler emftvm
-- @path Graph=/TTC2011/metamodels/graph.ecore
query nrOfLoopingEdges = Graph!Graph.allInstances()->first().loopingEdges->size().debug('nrOfLoopingEdges');

helper context Graph!Graph def : loopingEdges : Sequence(Graph!Edge) =
	self.edges->select(e|e.src = e.trg);