static referenceParametersAndReturn(parameters, returnValue) {
    return parameters && returnValue;
  }
Reference the input parameters so the compiler doesn't remove them from
the calling function.  Return whatever value is specified.

This allows an empty or default implementation of a config callback that
still bears the complete function signature even in compiled mode.

The caller should look something like this:

  const callback = (a, b, c, d) => {
    return referenceParametersAndReturn(
             [a, b, c, d],
             a);  // Can be anything, doesn't need to be one of the parameters
  };

@param {!Array<?>} parameters
@param {T} returnValue
@return {T}
@template T
@noinline