code: public static int getVIntSize(long i) {
          if (i >= -112 && i <= 127) {
              return 1;
          }
  
          if (i < 0) {
              i ^= -1L; // take one's complement'
          }
          // find the number of bytes with non-leading zeros
          int dataBits = Long.SIZE - Long.numberOfLeadingZeros(i);
          // find the number of data bytes + length byte
          return (dataBits + 7) / 8 + 1;
      }
docs: Get the encoded length if an integer is stored in a variable-length format
  @return the encoded length