const runtime.spanAllocHeap

9 uses

	runtime (current package)
		arena.go#L1063: 	h.initSpan(s, spanAllocHeap, spc, base, userArenaChunkPages)
		mheap.go#L934: 	spanAllocHeap          spanAllocType = iota // heap span
		mheap.go#L942: 	return s != spanAllocHeap
		mheap.go#L962: 		s = h.allocSpan(npages, spanAllocHeap, spanclass)
		mheap.go#L1350: 	if typ == spanAllocHeap {
		mheap.go#L1358: 	case spanAllocHeap:
		mheap.go#L1579: 		h.freeSpanLocked(s, spanAllocHeap)
		mheap.go#L1641: 	if typ == spanAllocHeap {
		mheap.go#L1647: 	case spanAllocHeap: