code: func (m *MultisigAddress) Absorb(digests ...Trytes) error {
  	for i := range digests {
  		if err := m.h.Absorb(MustTrytesToTrits(digests[i])); err != nil {
  			return err
  		}
  	}
  	return nil
  }
docs: // Absorb absorbs the given key digests.