static String tryUnbox(PsiVariable variable) {
    PsiType type = variable.getType();
    String mapOp = null;
    if (type.equals(PsiTypes.intType())) {
      mapOp = "mapToInt";
    }
    else if (type.equals(PsiTypes.longType())) {
      mapOp = "mapToLong";
    }
    else if (type.equals(PsiTypes.doubleType())) {
      mapOp = "mapToDouble";
    }
    return mapOp == null ? "" : "." + mapOp + "(" + variable.getName() + " -> " + variable.getName() + ")";
  }
static String tryUnbox(PsiVariable variable)