const source_hu_conv: NodeId = new NodeId(null, source);
const target_hu_conv: NodeId = new NodeId(null, target);
const usage_hu_conv: ChannelUsage = new ChannelUsage(null, usage);
const source_hu_conv: NodeId = new NodeId(null, source);
const target_hu_conv: NodeId = new NodeId(null, target);
const usage_hu_conv: ChannelUsage = new ChannelUsage(null, usage);