WP_REST_Font_Families_Controller::sanitize_font_family_settings( string $value ): array

159	public function sanitize_font_family_settings( $value ) {160		// Settings arrive as stringified JSON, since this is a multipart/form-data request.161		$settings = json_decode( $value, true );162		$schema   = $this->get_item_schema()['properties']['font_family_settings']['properties'];163 164		// Sanitize settings based on callbacks in the schema.165		foreach ( $settings as $key => $value ) {166			$sanitize_callback = $schema[ $key ]['arg_options']['sanitize_callback'];167			$settings[ $key ]  = call_user_func( $sanitize_callback, $value );168		}169 170		return $settings;171	}