func (h *HamtFunctional) Nentries() uint {
	return h.hamtBase.Nentries()
}
Nentries return the number of (key,value) pairs are stored in the
HamtFunctional data structure.
package hamt32
type HamtFunctional struct {
	hamtBase
}
func NewFunctional(tblOpt int) *HamtFunctional {
	var h = new(HamtFunctional)
	h.hamtBase.init(tblOpt)
	return h
}
func (h *HamtFunctional) IsEmpty() bool {
	return h.hamtBase.IsEmpty()
}