code: function markAsUsed(node) {
              if (!node.label) {
                  return;
              }
  
              const label = node.label.name;
              let info = scopeInfo;
  
              while (info) {
                  if (info.label === label) {
                      info.used = true;
                      break;
                  }
                  info = info.upper;
              }
          }
docs: Marks the label of a given node as used.
  
  @param {ASTNode} node - A node to mark. This is a BreakStatement or
  ContinueStatement.
  @returns {void}