code: public static String validateTableName(@Nullable String tableName) {
      requireNonNull(tableName, "Table name cannot be null");
      checkDbIdentifier(tableName, "Table name", TABLE_NAME_MAX_SIZE);
      return tableName;
    }
docs: Ensure {@code tableName} is a valid name for a table.
  @throws NullPointerException if {@code tableName} is {@code null}
  @throws IllegalArgumentException if {@code tableName} is not valid
  @return the same {@code tableName}
  @see #checkDbIdentifier(String, String, int)