def __CreateEmptyGraphNode(self):
    return self.__CreateGraphNode(shape='circle',
                                style='filled',
                                label="",
                                height='.1',
                                width='.1')
Create an Empty Node (with style), and return its index.
dataset/ETHPy150Open spranesh/Redhawk/redhawk/common/writers/dot_writer.py/DotWriter.__CreateEmptyGraphNode