Function toSource

src/helpers/set.js:722–732

* Converts `func` to its source code. * * @private * @param {Function} func The function to process. * @returns {string} Returns the source code.

(func)

 * @returns {string} Returns the source code.
 */
function toSource(func) {
  if (func != null) {
    try {
      return funcToString.call(func);
    } catch (e) {}
    try {
      return func + '';
    } catch (e) {}
  }
  return '';
}

/**
 * Creates a function that memoizes the result of `func`. If `resolver` is