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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_built_coherence(self, graph=None):
 """ Checks that node was build using input `graph`. :return: `Build` status. :raises GPflowError: Valid passed TensorFlow graph is different from used graph in node. """

        graph = self.enquire_graph(graph=graph)
        is_built = self.is_built(graph)
        if is_built is Build.NOT_COMPATIBLE_GRAPH:
            raise GPflowError('Tensor "{}" uses different graph.'.format(self.pathname))
        return is_built