docs: public ScriptBuilder data(int index, byte[] data) {
          // implements BIP62
          byte[] copy = Arrays.copyOf(data, data.length);
          int opcode;
          if (data.length == 0) {
              opcode = OP_0;
          } else if (data.length == 1) {
              byte b = data[0];
              if (b >= 1 && b <= 16)
                  opcode = Script.encodeToOpN(b);
              else
                  opcode = 1;
          } else if (data.length < OP_PUSHDATA1) {
              opcode = data.length;
          } else if (data.length < 256) {
              opcode = OP_PUSHDATA1;
          } else if (data.length < 65536) {
              opcode = OP_PUSHDATA2;
          } else {
              throw new RuntimeException("Unimplemented");
          }
          return addChunk(index, new ScriptChunk(opcode, copy));
      }