code: public static void startLiveValidation(final Fragment fragment, final IValidationCallback callback) {
  		startLiveValidation(fragment, fragment.getView(), callback);
  	}
docs: Start live validation - whenever focus changes from view with validations upon itself, validators will run. <br/>
  Don't forget to call {@link #stopLiveValidation(Object)} once you are done.
  @param fragment fragment with views to validate, there can be only one continuous validation per target object (fragment)
  @param callback callback invoked whenever there is some validation fail