code: protected IStyleAppendable appendCluster(IStyleAppendable it, String element0, String... elements) {
  		return appendCluster(it, true, element0, elements);
  	}
docs: Append elements to the Vim top cluster.
  
  @param it the receiver of the generated elements.
  @param element0 the first element to add into the cluster.
  @param elements the other elements to add into the cluster.
  @return {@code it}.