const runtime.spanAllocHeap

9 uses

	runtime (current package)
		arena.go#L1058: 	h.initSpan(s, spanAllocHeap, spc, base, userArenaChunkPages, userArenaChunkBytes)
		mheap.go#L990: 	spanAllocHeap    spanAllocType = iota // heap span
		mheap.go#L997: 	return s != spanAllocHeap
		mheap.go#L1017: 		s = h.allocSpan(npages, spanAllocHeap, spanclass)
		mheap.go#L1409: 	if typ == spanAllocHeap {
		mheap.go#L1417: 	case spanAllocHeap:
		mheap.go#L1694: 		h.freeSpanLocked(s, spanAllocHeap)
		mheap.go#L1765: 	if typ == spanAllocHeap {
		mheap.go#L1771: 	case spanAllocHeap: