docs: public static NetFlowV9Header parseHeader(ByteBuf bb) {
          final int version = bb.readUnsignedShort();
          if (version != 9) {
              throw new InvalidFlowVersionException(version);
          }
  
          final int count = bb.readUnsignedShort();
          final long sysUptime = bb.readUnsignedInt();
          final long unixSecs = bb.readUnsignedInt();
          final long sequence = bb.readUnsignedInt();
          final long sourceId = bb.readUnsignedInt();
  
          return NetFlowV9Header.create(version, count, sysUptime, unixSecs, sequence, sourceId);
      }