get beamline definition from all_elements, return as a list
        :param beamlineKw: keyword of beamline

def getBeamline(self, beamlineKw):
        """ get beamline definition from all_elements, return as a list
        :param beamlineKw: keyword of beamline
        """
        lattice_string = list(self.all_elements.get(beamlineKw.upper()).values())[0].get('lattice')
        return lattice_string[1:-1].split()