golang.org/x/net/http2.sortPriorityNodeSiblingsRFC7540.Len (method, view implemented interface methods)

one use

	golang.org/x/net/http2 (current package)
		writesched_priority_rfc7540.go#L182: func (z sortPriorityNodeSiblingsRFC7540) Len() int      { return len(z) }