@NonNull protected static List<RaveError> mustBeTrue(boolean input,@NonNull ValidationContext validationContext){
  return input ? Collections.<RaveError>emptyList() : createNewList(new RaveError(validationContext,RaveErrorStrings.MUST_BE_TRUE_ERROR));
}

@ NonNull protected static List < RaveError > mustBeTrue ( boolean input , @ NonNull ValidationContext validationContext ) { return input ? Collections . < RaveError > emptyList ( ) : createNewList ( new RaveError ( validationContext , RaveErrorStrings . MUST_BE_TRUE_ERROR ) ) ; }
verifies the input to be always true .
