code: public boolean isZeroHost(int prefixLength) {
  		if(prefixLength < 0 || prefixLength > getBitCount()) {
  			throw new PrefixLenException(this, prefixLength);
  		}
  		return isZeroHost(prefixLength, getSegments(), getBytesPerSegment(), getBitsPerSegment(), getBitCount());
  	}
docs: Returns whether the host is zero for the given prefix length for this section or all sections in this set of address sections.
  If this section already has a prefix length, then that prefix length is ignored.
  If the host section is zero length (there are no host bits at all), returns false.
  
  @return