@Nullable
  private PsiElement findInsertionAnchor(PsiGenerationInfo<PsiMethod> info,
                                         PsiClass targetClass) {
    PsiElement parent = targetClass instanceof GroovyScriptClass ? ((GroovyScriptClass)targetClass).getContainingFile() : targetClass;
    if (PsiTreeUtil.isAncestor(parent, getRefExpr(), false)) {
      return info.findInsertionAnchor(targetClass, getRefExpr());
    }
    else {
      return null;
    }
  }
@Nullable
  private PsiElement findInsertionAnchor(PsiGenerationInfo<PsiMethod> info,
                                         PsiClass targetClass)