Walker::display_element( object $element, array $children_elements, int $max_depth, int $depth, array $args, string $output )

133	public function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {134		if ( ! $element ) {135			return;136		}137 138		$max_depth = (int) $max_depth;139		$depth     = (int) $depth;140 141		$id_field = $this->db_fields['id'];142		$id       = $element->$id_field;143 144		// Display this element.145		$this->has_children = ! empty( $children_elements[ $id ] );146		if ( isset( $args[0] ) && is_array( $args[0] ) ) {147			$args[0]['has_children'] = $this->has_children; // Back-compat.148		}149 150		$this->start_el( $output, $element, $depth, ...array_values( $args ) );151 152		// Descend only when the depth is right and there are children for this element.153		if ( ( 0 === $max_depth || $max_depth > $depth + 1 ) && isset( $children_elements[ $id ] ) ) {154 155			foreach ( $children_elements[ $id ] as $child ) {156 157				if ( ! isset( $newlevel ) ) {158					$newlevel = true;159					// Start the child delimiter.160					$this->start_lvl( $output, $depth, ...array_values( $args ) );161				}162				$this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );163			}164			unset( $children_elements[ $id ] );165		}166 167		if ( isset( $newlevel ) && $newlevel ) {168			// End the child delimiter.169			$this->end_lvl( $output, $depth, ...array_values( $args ) );170		}171 172		// End this element.173		$this->end_el( $output, $element, $depth, ...array_values( $args ) );174	}