build/es-class.max.amd.js
function define(target, key, value, publicStatic) {
    var configurable = isConfigurable(key, publicStatic);
    defineProperty(target, key, {
      enumerable: false, // was: publicStatic,
      configurable: configurable,
      writable: configurable,
      value: value
    });
  }
function define(target, key, value, publicStatic) {
    var configurable = isConfigurable(key, publicStatic);
    defineProperty(target, key, {
      enumerable: false, // was: publicStatic,
      configurable: configurable,
      writable: configurable,
      value: value
    });
  }
function define ( target , key , value , publicStatic ) { var configurable = isConfigurable ( key , publicStatic ) ; defineProperty ( target , key , { enumerable : false , // was: publicStatic, configurable : configurable , writable : configurable , value : value } ) ; }
common defineProperty wrapper
common defineProperty wrapper