WP_REST_Terms_Controller::create_item( WP_REST_Request $request ): WP_REST_Response|WP_Error

501	public function create_item( $request ) {502		if ( isset( $request['parent'] ) ) {503			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {504				return new WP_Error(505					'rest_taxonomy_not_hierarchical',506					__( 'Cannot set parent term, taxonomy is not hierarchical.' ),507					array( 'status' => 400 )508				);509			}510 511			$parent = get_term( (int) $request['parent'], $this->taxonomy );512 513			if ( ! $parent ) {514				return new WP_Error(515					'rest_term_invalid',516					__( 'Parent term does not exist.' ),517					array( 'status' => 400 )518				);519			}520		}521 522		$prepared_term = $this->prepare_item_for_database( $request );523 524		$term = wp_insert_term( wp_slash( $prepared_term->name ), $this->taxonomy, wp_slash( (array) $prepared_term ) );525		if ( is_wp_error( $term ) ) {526			/*527			 * If we're going to inform the client that the term already exists,528			 * give them the identifier for future use.529			 */530			$term_id = $term->get_error_data( 'term_exists' );531			if ( $term_id ) {532				$existing_term = get_term( $term_id, $this->taxonomy );533				$term->add_data( $existing_term->term_id, 'term_exists' );534				$term->add_data(535					array(536						'status'  => 400,537						'term_id' => $term_id,538					)539				);540			}541 542			return $term;543		}544 545		$term = get_term( $term['term_id'], $this->taxonomy );546 547		/**548		 * Fires after a single term is created or updated via the REST API.549		 *550		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.551		 *552		 * Possible hook names include:553		 *554		 *  - `rest_insert_category`555		 *  - `rest_insert_post_tag`556		 *557		 * @since 4.7.0558		 *559		 * @param WP_Term         $term     Inserted or updated term object.560		 * @param WP_REST_Request $request  Request object.561		 * @param bool            $creating True when creating a term, false when updating.562		 */563		do_action( "rest_insert_{$this->taxonomy}", $term, $request, true );564 565		$schema = $this->get_item_schema();566		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {567			$meta_update = $this->meta->update_value( $request['meta'], $term->term_id );568 569			if ( is_wp_error( $meta_update ) ) {570				return $meta_update;571			}572		}573 574		$fields_update = $this->update_additional_fields_for_object( $term, $request );575 576		if ( is_wp_error( $fields_update ) ) {577			return $fields_update;578		}579 580		$request->set_param( 'context', 'edit' );