Astra_Walker_Page::start_el( string $output, WP_Post $page, int $depth, array $args = array(), int $current_page )

		public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) {
			$css_class   = array( 'page_item', 'page-item-' . $page->ID );
			$icon        = '';
			$mobile_icon = '';

			if ( isset( $args['pages_with_children'][ $page->ID ] ) ) {
				$css_class[] = 'menu-item-has-children';
				$icon        = Astra_Icons::get_icons( 'arrow' );
				$icon        = '<span role="presentation" class="dropdown-menu-toggle">' . $icon . '</span>';
				// Add toggle button if menu is from Astra.
				if ( true === is_object( $args ) ) {
					if ( isset( $args->theme_location ) &&
					( 'primary' === $args->theme_location ||
					'above_header_menu' === $args->theme_location ||
					'below_header_menu' === $args->theme_location )
					) {
						$mobile_icon = '<button ' . astra_attr(
							'ast-menu-toggle',
							array(
								'aria-expanded' => 'false',
							),
							$page
						) . '><span class="screen-reader-text">' . __( 'Menu Toggle', 'astra' ) . '</span>' . Astra_Icons::get_icons( 'arrow' ) . '</button>';
					}
				} else {
					if ( isset( $page->post_parent ) && 0 === $page->post_parent ) {
						$mobile_icon = '<button ' . astra_attr(
							'ast-menu-toggle',
							array(
								'aria-expanded' => 'false',
							),
							$page
						) . '><span class="screen-reader-text">' . __( 'Menu Toggle', 'astra' ) . '</span>' . Astra_Icons::get_icons( 'arrow' ) . '</button>';
					}
				}
			}

			if ( ! empty( $current_page ) ) {
				$_current_page = get_post( $current_page );
				if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) {
					$css_class[] = 'current-menu-ancestor';
				}
				if ( $page->ID == $current_page ) {
					$css_class[] = 'current-menu-item';
				} elseif ( $_current_page && $page->ID == $_current_page->post_parent ) {
					$css_class[] = 'current-menu-parent';
				}
			} elseif ( get_option( 'page_for_posts' ) == $page->ID ) {
				$css_class[] = 'current-menu-parent';
			}

			$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) );

			$args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before'];
			$args['link_after']  = empty( $args['link_after'] ) ? '' : $args['link_after'];

			$output .= sprintf(
				'<li class="%s"><a href="%s" class="menu-link">%s%s%s%s</a>%s',
				$css_classes,
				get_permalink( $page->ID ),
				$args['link_before'],
				apply_filters( 'the_title', $page->post_title, $page->ID ),
				$args['link_after'],
				$icon,
				$mobile_icon
			);
		}