30-seconds-of-code/node_modules/babel-plugin-minify-mangle-names/lib/is-label-identifier.js

"use strict";

module.exports = isLabelIdentifier;

function isLabelIdentifier(path) {
  var node = path.node;

  return path.parentPath.isLabeledStatement({ label: node }) || path.parentPath.isBreakStatement({ label: node }) || path.parentPath.isContinueStatement({ label: node });
}