whole_func_string: function (val) {
          val = ensureDefault(val, constants_1.DEFAULT_TYPE_VALUES.array);
          if (!Array.isArray(val))
              val = [val];
          return val;
      }
func_code_string: function (val) {
          val = ensureDefault(val, constants_1.DEFAULT_TYPE_VALUES.array);
          if (!Array.isArray(val))
              val = [val];
          return val;
      }
func_documentation_string: Converts type to an array.
  
  @param val the value to convert.