code: func (a *Assertions) Empty(object interface{}, msgAndArgs ...interface{}) bool {
  	if h, ok := a.t.(tHelper); ok {
  		h.Helper()
  	}
  	return Empty(a.t, object, msgAndArgs...)
  }
docs: // Empty asserts that the specified object is empty.  I.e. nil, "", false, 0 or either
  // a slice or a channel with len == 0.
  //
  //  a.Empty(obj)