def __call_internal__(self, *args, **kwargs):
        self.store_kwargs(kwargs)
        self.source = self._source_function(*args, **kwargs)
        # Copy the pipeline so as not to modify it for the next call
        self.pipeline = self._pipeline[:]
        return self.build_pipeline()
Builds the source and runs through the pipeline, returning
dataset/ETHPy150Open enthought/mayavi/mayavi/tools/helper_functions.py/Pipeline.__call_internal__