private boolean isNullableCoreType(HashSet<String> resolvedTypesSet){
  if (resolvedTypesSet.size() != 2 || !resolvedTypesSet.contains(Types.strNull)) {
    return false;
  }
  return resolvedTypesSet.contains(Types.strInteger) || resolvedTypesSet.contains(Types.strFloat) || resolvedTypesSet.contains(Types.strResource);
}

private boolean isNullableCoreType ( HashSet < String > resolvedTypesSet ) { if ( resolvedTypesSet . size ( ) != 2 || ! resolvedTypesSet . contains ( Types . strNull ) ) { return false ; } return resolvedTypesSet . contains ( Types . strInteger ) || resolvedTypesSet . contains ( Types . strFloat ) || resolvedTypesSet . contains ( Types . strResource ) ; }
check if nullable int , float , resource
