code: function parseArgs(argList, sig) {
    sig.args = argList.map(function(rawArg) {
      let arg = parseArg(rawArg);
      if (!arg.literal) {
        sig.static = false;
      }
      return arg;
    }, this);
    return sig;
  }
docs: Parses an array of arguments and sets the `args` property of the supplied
  signature metadata object. Sets the `static` property to false if any
  argument is a non-literal.
  
  @param {!Array<string>} argList Array of argument names
  @param {!MethodSignature} sig Method signature metadata object
  @return {!MethodSignature} The updated signature metadata object
  @private