private static PsiExpression addMethodReference(@NotNull PsiExpression expression, @NotNull GuavaLambda lambda) {
    final PsiExpression methodReference = JavaPsiFacade.getElementFactory(expression.getProject())
      .createExpressionFromText(expression.getText() + "::" + lambda.getSamName(), expression);
    return (PsiExpression)expression.replace(methodReference);
  }
private static PsiExpression addMethodReference(@NotNull PsiExpression expression, @NotNull GuavaLambda lambda)