private static boolean firstOwnerParameterMustBeMap(final GrParameterListOwner owner) {
    final GrParameter first = getFirstParameter(owner);
    final PsiType type = first.getTypeGroovy();
    if (type == null) return true;
    // First parameter may be used as map
    return type.isConvertibleFrom(createTypeByFQClassName(JAVA_UTIL_LINKED_HASH_MAP, owner));
  }
private static boolean firstOwnerParameterMustBeMap(final GrParameterListOwner owner)