public Builder SetInput(int hint, int prefill, bool allowEmptyInput, InputCallback callback)
 {
     return SetInput(hint, prefill, allowEmptyInput, (IInputCallback)callback);
 }
 public Builder SetInput(int hint, int prefill, InputCallback callback)
 {
     return SetInput(hint, prefill, (IInputCallback)callback);
 }
 public Builder SetInput(string hint, string prefill, InputCallback callback)
 {
     return SetInput(hint, prefill, (IInputCallback)callback);
 }