'Initializes the feature ID extractor component.
Args:
master: dragnn.MasterBuilder object.
component_spec: dragnn.ComponentSpec proto to be built.'

def __init__(self, master, component_spec):

    super(BulkFeatureIdExtractorComponentBuilder, self).__init__(master, component_spec)
    check.Eq(len(self.spec.linked_feature), 0, 'Linked    features    are    forbidden')
    for feature_spec in self.spec.fixed_feature:
        check.Lt(feature_spec.embedding_dim, 0, ('Features    must    be    non-embedded:    %s' % feature_spec))
