Macro impl_leaf_entity_table 

macro_rules! impl_leaf_entity_table {
    (
        entity: $Entity:ident,
        entity_name: $entity_name:expr,
        store_field: $store_field:ident,
        table_trait: $TableTrait:ident,
        table_ro_trait: $TableROTrait:ident,
        table_struct: $TableStruct:ident,
        table_ro_struct: $TableROStruct:ident,
        backward_junctions: [ $( ($bj_field:ident, $bj_name:expr) ),* ],
    ) => { ... };
}