public Builder forwardHttpDestinations(final Collection<ForwardHttpPostConfig> forwarderHttpConfigs) {
            this.forwardHttpDestinations.clear();
            if (forwarderHttpConfigs != null) {
                this.forwardHttpDestinations.addAll(forwarderHttpConfigs);
            }
            return this;
        }
Builds a {@link PropertyPath} by merging parts onto the root {@link PropertyPath}
stroom-proxy/stroom-proxy-app/src/main/java/stroom/proxy/app/ProxyConfig.java