go
//	// INVALID: a directly-declared header will not hold Data as a reference.
//	var hdr reflect.StringHeader
//	hdr.Data = uintptr(unsafe.Pointer(p))
//	hdr.Len = n
//	s := *(*string)(unsafe.Pointer(&hdr)) // p possibly already lost
type Pointer *ArbitraryType


type ArvitraryType int

// Sizeof takes an expression x of any type and returns the size in bytes
// of a hypothetical variable v as if v was declared via var v = x.
// The size does not include any memory pos