def pattern(self):
    return dict(nodes=[('merge', dict(kind='op', op='Merge')), ('merge_data', dict(kind='data'))], edges=[('merge', 'merge_data')])
def pattern(self):
    return dict(nodes=[('merge', dict(kind='op', op='Merge')), ('merge_data', dict(kind='data'))], edges=[('merge', 'merge_data')])