code: function empowerCore (assert, options) {
      var typeOfAssert = (typeof assert);
      var enhancedAssert;
      if ((typeOfAssert !== 'object' && typeOfAssert !== 'function') || assert === null) {
          throw new TypeError('empower-core argument should be a function or object.');
      }
      if (isEmpowered(assert)) {
          return assert;
      }
      switch (typeOfAssert) {
      case 'function':
          enhancedAssert = empowerAssertFunction(assert, options);
          break;
      case 'object':
          enhancedAssert = empowerAssertObject(assert, options);
          break;
      default:
          throw new Error('Cannot be here');
      }
      define(enhancedAssert, { _empowered: true });
      return enhancedAssert;
  }
docs: Enhance Power Assert feature to assert function/object.
  @param assert target assert function or object to enhance
  @param options enhancement options
  @return enhanced assert function/object