lodash/_toSource.js

define(['./isFunction', './toString'], function(isFunction, toString) {

  /** Used to resolve the decompiled source of functions. */
  var funcToString = Function.prototype.toString;

  /**
   * Converts `func` to its source code.
   *
   * @private
   * @param {Function} func The function to process.
   * @returns {string} Returns the source code.
   */
  function toSource(func) {
    if (isFunction(func)) {
      try {
        return funcToString.call(func);
      } catch (e) {}
    }
    return toString(func);
  }

  return toSource;
});