public ValidationInfo validateName(@Nullable String text) {
    if (text.isBlank()) {
      return new ValidationInfo(JavaRefactoringBundle.message("migration.edit.empty.name"));
    }

    if (myMigrationMapSet.findMigrationMap(text) != null && (myEditedMapName.isEmpty() || !text.equals(myEditedMapName))) {
      // new map with existing name || edited map with another existing name
      return new ValidationInfo(JavaRefactoringBundle.message("migration.edit.existing.name"));
    }
    return null;
  }
public ValidationInfo validateName(@Nullable String text)