@Nullable
  private String isMethodNameCanBeChanged(PsiMethod method) {
    if (myCurrentRoot == null) {
      return null;
    }
    final PsiElement root = myCurrentRoot.getElement();
    if (!(root instanceof PsiField field)) {
      return null;
    }
    final PsiType migrationType = myTypeEvaluator.getType(root);
    if (migrationType == null) {
      return null;
    }
    final PsiType sourceType = field.getType();
    if (TypeConversionUtil.isAssignable(migrationType, sourceType)) {
      return null;
    }
    if (!(migrationType.equals(PsiTypes.booleanType()) || migrationType.equals(PsiTypes.booleanType().getBoxedType(field))) &&
        !(sourceType.equals(PsiTypes.booleanType()) || sourceType.equals(PsiTypes.booleanType().getBoxedType(field)))) {
      return null;
    }
    final PsiMethod[] getters =
      GetterSetterPrototypeProvider.findGetters(field.getContainingClass(), field.getName(), field.hasModifierProperty(PsiModifier.STATIC));
    if (getters != null) {
      for (PsiMethod getter : getters) {
        if (getter.isEquivalentTo(method)) {
          final String suggestedName = GenerateMembersUtil.suggestGetterName(field.getName(), migrationType, method.getProject());
          if (!suggestedName.equals(method.getName())) {
            if (getter.getContainingClass().findMethodsByName(suggestedName, true).length != 0) {
              return null;
            }
            return suggestedName;
          }
          return null;
        }
      }
    }
    return null;
  }
@Nullable
  private String isMethodNameCanBeChanged(PsiMethod method)