private boolean isNullInferred(String exprText) {
    final PsiCodeBlock block = myElementFactory.createCodeBlockFromText("{}", myElements[0]);
    for (PsiElement element : myElements) {
      block.add(element);
    }
    PsiReturnStatement statementFromText = (PsiReturnStatement)myElementFactory.createStatementFromText("return " + exprText + ";", null);
    statementFromText = (PsiReturnStatement)block.add(statementFromText);

    return inferNullability(block, Objects.requireNonNull(statementFromText.getReturnValue())) == Nullability.NOT_NULL;
  }
private boolean isNullInferred(String exprText)