code: public void create(String fqn, boolean ephemeral) {
          awaitRunning();
          try {
              LOG.trace("Creating {} {}", fqn, ephemeral ? "(ephemeral)" : "");
              channel.send(new Message(null, new Request(Request.CREATE, fqn, ephemeral)));
              synchronized (updateCondition) {
                  while (!exists(fqn))
                      updateCondition.wait();
              }
          } catch (Exception ex) {
              LOG.error("failure bcasting PUT request", ex);
          }
      }
docs: Adds a new node to the tree. If the node does not exist yet, it will be created. Also, parent nodes will be created if non-existent. If the node already exists, this is a no-op, it's status as
  ephemeral may change.
  
  @param fqn The fully qualified name of the new node
  @param data The new data. May be null if no data should be set in the node.