def METHOD_NAME(self, hdf=None, group_name=None):
    """
    Store the StructureListMaster object in the HDF5 File
    Args:
        hdf (ProjectHDFio): HDF5 group object - optional
        group_name (str): HDF5 subgroup name - optional
    """
    super(StructureListMaster, self).METHOD_NAME(hdf=hdf, group_name=group_name)
    with self.project_hdf5.open("input/structures") as hdf5_input:
        for ind, struct in enumerate(self.structure_lst):
            struct.METHOD_NAME(hdf=hdf5_input, group_name="s_" + str(ind))