public static boolean equals(char @NotNull [] buffer1, int start1, int end1, char @NotNull [] buffer2, int start2, int end2) {
    if (end1 - start1 != end2 - start2) return false;
    for (int i = start1; i < end1; i++) {
      if (buffer1[i] != buffer2[i - start1 + start2]) return false;
    }
    return true;
  }
public static boolean equals(char @NotNull [] buffer1, int start1, int end1, char @NotNull [] buffer2, int start2, int end2)