wp_editor() and Genesis Admin Page

gistfile1.php

<?php

class Test_Setting_Admin extends Genesis_Admin_Boxes {
	
	/**
	 * Create an admin menu item and settings page.
	 *
	 * @since 1.0
	 */
	function __construct() {
		
		$page_id = 'test_setting_admin';

		$menu_ops = array(
			'submenu' => array(
				'parent_slug' => 'genesis',
				'page_title'  => __( 'Genesis - Test Setting Admin', 'text-domain' ),
				'menu_title'  => __( 'Test Setting Icon', 'text-domain' )
			)
		);

		$page_ops = array(
			'screen_icon' => 'plugins',
		);

		$settings_field = TEST_SETTING_FIELD;

		$default_settings = array(
			'content_bar'	=> 'Hello World',
		);

		/** Create the page */
		$this->create( $page_id, $menu_ops, $page_ops, $settings_field, $default_settings );
		
	}
	
	/**
	 * Load the necessary scripts for this admin page.
	 *
	 * @since 1.0
	 *
	 */
	function scripts() {
		
		/** Load parent scripts as well as Genesis admin scripts */
		parent::scripts();
		genesis_load_admin_js();
		
	}
	
	/**
 	 * Register meta boxes.
 	 *
 	 * @since 1.0
 	 *
 	 */
	function metaboxes() {
		add_meta_box( 'test-general-settings', __( 'General Settings', 'text-domain' ), array( $this, 'test_general_settings' ), $this->pagehook, 'main' );
	}
	
	/**
 	 * Callback function for test_general_settings
 	 *
 	 * @since 0.1
 	 *
 	 */
	function test_general_settings() {
		?>

		<p>
			<label for="<?php echo $this->get_field_id( 'content_bar' ); ?>"><?php _e( 'Your conent', 'text-domain' ); ?></label>
			<?php wp_editor(  get_field_value( 'content_bar' )  , $this->get_field_id( 'content_bar' ), array( 'textarea_name' => 'content', 'media_buttons' => false, 'textarea_rows' => 8 ) ); ?>
		</p>

		<?php
	}
	
}

add_action( 'genesis_admin_menu', 'test_setting_admin' );
/**
 * Instantiate the class to create the menu.
 *
 * @since 1.0
 */
function test_setting_admin() {

	new Test_Setting_Admin;

}