def METHOD_NAME(self):
    """CLI produces correct evaluation of requested element"""
    # A nested data element
    elem_str = "BeamSequence[0].ControlPointSequence[0].NominalBeamEnergy"
    elem_val = eval_element(self.plan, elem_str)
    assert 6.0 == elem_val
    # A nested Sequence item
    elem_str = "BeamSequence[0].ControlPointSequence[0]"
    elem_val = eval_element(self.plan, elem_str)
    assert 6.0 == elem_val.NominalBeamEnergy
    # A nested Sequence itself
    elem_str = "BeamSequence[0].ControlPointSequence"
    elem_val = eval_element(self.plan, elem_str)
    assert 6.0 == elem_val[0].NominalBeamEnergy
    # A non-nested data element
    elem_str = "PatientID"
    elem_val = eval_element(self.plan, elem_str)
    assert "id00001" == elem_val
    # The file_meta or file_meta data element
    elem_str = "file_meta"
    elem_val = eval_element(self.plan, elem_str)
    assert "RT Plan Storage" == elem_val.MediaStorageSOPClassUID.name
    elem_str = "file_meta.MediaStorageSOPClassUID"
    elem_val = eval_element(self.plan, elem_str)
    assert "RT Plan Storage" == elem_val.name