String (@NotNull PsiFile file, Object o) { if (o instanceof PsiMethod method) { final PsiType type = method.getReturnType(); if (PsiTypes.voidType().equals(type) || PsiTypes.nullType().equals(type)) return null; if (!method.getParameterList().isEmpty()) return null; return method.getName() + "(" + getSpace(CodeStyle.getLanguageSettings(file).SPACE_WITHIN_EMPTY_METHOD_CALL_PARENTHESES) + ")"; } else if (o instanceof PsiVariable variable) { return variable.getName(); } return null; }