Astra_LearnDash::sidebar_layout( string $layout )

		public function sidebar_layout( $layout ) {

			if ( is_singular( 'sfwd-courses' ) || is_singular( 'sfwd-lessons' ) || is_singular( 'sfwd-topic' ) || is_singular( 'sfwd-quiz' ) || is_singular( 'sfwd-certificates' ) || is_singular( 'sfwd-assignment' ) ) {

				$learndash_sidebar = astra_get_option( 'learndash-sidebar-layout' );
				if ( 'default' !== $learndash_sidebar ) {
					$layout = $learndash_sidebar;
				}

				$sidebar = astra_get_option_meta( 'site-sidebar-layout', '', true );

				if ( 'default' !== $sidebar && ! empty( $sidebar ) ) {
					$layout = $sidebar;
				}
			}

			// When Learhdash shortoce is used on the Page.
			// Applied only to the pages which uses the learndash shortcode.
			global $learndash_shortcode_used;

			if ( $learndash_shortcode_used && ! ( is_singular( 'sfwd-courses' ) || is_singular( 'sfwd-lessons' ) || is_singular( 'sfwd-topic' ) || is_singular( 'sfwd-quiz' ) || is_singular( 'sfwd-certificates' ) || is_singular( 'sfwd-assignment' ) ) ) {
				// Page Meta Sidebar.
				$layout = astra_get_option_meta( 'site-sidebar-layout', '', true );
				if ( empty( $layout ) ) {
					// Page Sidebar.
					$layout = astra_get_option( 'single-page-sidebar-layout' );
					// Default Site Sidebar.
					if ( 'default' == $layout || empty( $layout ) ) {
						// Get the global sidebar value.
						// NOTE: Here not used `true` in the below function call.
						$layout = astra_get_option( 'site-sidebar-layout' );
					}
				}
			}
			return $layout;
		}