@Override
  public ChangeInfo createChangeSignatureInfo(GrMethod method, List<? extends GrParameterInfo> newParameterInfos, boolean delegate) {
    final PsiType returnType = method.getReturnType();
    return new GrChangeInfoImpl(method,
                                VisibilityUtil.getVisibilityModifier(method.getModifierList()),
                                returnType != null ? CanonicalTypes.createTypeWrapper(returnType) : null,
                                method.getName(),
                                newParameterInfos,
                                null,
                                delegate);
  }
@Override
  public ChangeInfo createChangeSignatureInfo(GrMethod method, List<? extends GrParameterInfo> newParameterInfos, boolean delegate)