Member grn_column_index (grn_ctx *ctx, grn_obj *column, grn_operator op, grn_obj **indexbuf, int buf_size, int *section): Since 5.0.1. Use grn_column_find_index_data instead.
Member grn_geo_estimate_in_rectangle (grn_ctx *ctx, grn_obj *index, grn_obj *top_left_point, grn_obj *bottom_right_point): Since 4.0.8. Use grn_geo_estimate_size_in_rectangle instead.
Member GRN_OBJ_KEY_NORMALIZE: This was used when only NormalizerAuto was available. Now you can specify a normalizer, so there is no need to use it.