UNUSED            200 id_table.c     UNUSED(ID_TABLE_IMPL_TYPE *IMPL(_create)(size_t));
UNUSED            201 id_table.c     UNUSED(void IMPL(_free)(ID_TABLE_IMPL_TYPE *));
UNUSED            202 id_table.c     UNUSED(void IMPL(_clear)(ID_TABLE_IMPL_TYPE *));
UNUSED            203 id_table.c     UNUSED(size_t IMPL(_size)(const ID_TABLE_IMPL_TYPE *));
UNUSED            204 id_table.c     UNUSED(size_t IMPL(_memsize)(const ID_TABLE_IMPL_TYPE *));
UNUSED            205 id_table.c     UNUSED(int IMPL(_insert)(ID_TABLE_IMPL_TYPE *, ID, VALUE));
UNUSED            206 id_table.c     UNUSED(int IMPL(_lookup)(ID_TABLE_IMPL_TYPE *, ID, VALUE *));
UNUSED            207 id_table.c     UNUSED(int IMPL(_delete)(ID_TABLE_IMPL_TYPE *, ID));
UNUSED            208 id_table.c     UNUSED(void IMPL(_foreach)(ID_TABLE_IMPL_TYPE *, rb_id_table_foreach_func_t *, void *));
UNUSED            209 id_table.c     UNUSED(void IMPL(_foreach_values)(ID_TABLE_IMPL_TYPE *, rb_id_table_foreach_values_func_t *, void *));