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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 build(self):
 """ Implementation for ICompilable interface `build` method. Builds tensors within TensorFlow name scope using parentable node's name. Hidden name is used when no parent exists for current node. :raises GPflowError: Node's parts were built with different graph and differ from default TensorFlow graph. """

        if self.is_built_coherence() is Build.NO:
            with tf.name_scope(self.tf_name_scope):
                self._build()