code: @Override
  	public boolean isPrefixBlock() {
  		Integer networkPrefixLength = getNetworkPrefixLength();
  		if(networkPrefixLength == null) {
  			return false;
  		}
  		if(getNetwork().getPrefixConfiguration().allPrefixedAddressesAreSubnets()) {
  			return true;
  		}
  		return containsPrefixBlock(networkPrefixLength);
  	}
docs: Returns whether this address section represents a subnet block of addresses associated its prefix length.
  
  Returns false if it has no prefix length, if it is a single address with a prefix length (ie not a subnet), or if it is a range of addresses that does not include
  the entire subnet block for its prefix length.
  
  If {@link AddressNetwork#getPrefixConfiguration} is set to consider all prefixes as subnets, this returns true for any grouping with prefix length.
  
  @return