code: func (v *Alloc) String() string {
  	op := "local"
  	if v.Heap {
  		op = "new"
  	}
  	from := v.Parent().pkg()
  	return fmt.Sprintf("%s %s (%s)", op, relType(deref(v.Type()), from), v.Comment)
  }
docs: // Instruction.String()