static Kind of(final int prefix) {
      if (prefix <= 0x7F) {
        return Kind.BYTE_ELEMENT;
      } else if (prefix <= 0xb7) {
        return Kind.SHORT_ELEMENT;
      } else if (prefix <= 0xbf) {
        return Kind.LONG_ELEMENT;
      } else if (prefix <= 0xf7) {
        return Kind.SHORT_LIST;
      } else {
        return Kind.LONG_LIST;
      }
    }
The kind of items an RLP item can be.
ethereum/rlp/src/main/java/org/hyperledger/besu/ethereum/rlp/RLPDecodingHelpers.java