@Contract(pure = true)
  @Deprecated
  @ApiStatus.ScheduledForRemoval
  public static @NotNull String replaceChar(@NotNull String buffer, char oldChar, char newChar) {
    return buffer.replace(oldChar, newChar);
  }
@Contract(pure = true)
  @Deprecated
  @ApiStatus.ScheduledForRemoval
  public static @NotNull String replaceChar(@NotNull String buffer, char oldChar, char newChar)