code: public JBBPDslBuilder Bits(final String name, final JBBPBitNumber bits) {
      final Item item = new Item(BinType.BIT, name, this.byteOrder);
      item.bitNumber = bits;
      this.addItem(item);
      return this;
    }
docs: Add named fixed length bit field.
  
  @param name name of the field, if null then anonymous one
  @param bits number of bits as length of the field, must not be null
  @return the builder instance, must not be null