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