=> 'boolean',
						),
					),
				),
				'icon'           => array(
					'description' => __( 'The icon for the post type.' ),
					'type'        => array( 'string', 'null' ),
					'context'     => array( 'view', 'edit', 'embed' ),
					'readonly'    => true,
				),
			),
		);

		$this->schema = $schema;

		return $this->add_additional_fields_schema( $this->schema );
	}

	/**
	 * Retrieves the query params for collections.
	 *
	 * @since 4.7.0
	 *
	 * @return array Collection parameters.
	 */
	public function get_collection_params() {
		return array(
			'context' => $this->get_context_param( array( 'default' => 'view' ) ),
		);
	}
}
<br />
<b>Fatal error</b>:  require(): Failed opening required '/var/www/html/helitower.com.br/web/wp-includes/sitemaps/class-wp-sitemaps-provider.php' (include_path='.:/usr/share/pear') in <b>/var/www/html/helitower.com.br/web/wp-settings.php</b> on line <b>334</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function set() on null in /var/www/html/helitower.com.br/web/wp-includes/l10n.php:854
Stack trace:
#0 /var/www/html/helitower.com.br/web/wp-includes/l10n.php(957): load_textdomain('default', '/var/www/html/h...', 'pt_BR')
#1 /var/www/html/helitower.com.br/web/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#3 {main}
  thrown in <b>/var/www/html/helitower.com.br/web/wp-includes/l10n.php</b> on line <b>854</b><br />