class Scope::Impl {
 public:
  // A NameMap is used to keep track of suffixes for names used in a scope. A
  // name that has not been used so far in a scope will get no suffix. Later
  // uses of the same name will get suffixes _1, _2, _3, etc. Multiple scopes
  // can share the same NameMap. For instance, a new scope created using
  // WithControlDependencies() would share the same NameMap with the parent.

		t.baseList = append(t.baseList, nil)
		t.indexMap = make(map[*PosBase]int)
		t.nameMap = make(map[string]int)
	}

	i := len(t.baseList)
	t.indexMap[base] = i
	t.baseList = append(t.baseList, base)

	fileIndex, ok := t.nameMap[base.absFilename]
	if !ok {
		fileIndex = len(t.nameMap)
		t.nameMap[base.absFilename] = fileIndex
	}
	base.fileIndex = fileIndex

	return int32(i)
}

			fns = append(fns, cs[idx].handler)
		}
	}

	return
}

func removeCallbacks(cs []*callback, nameMap map[string]bool) []*callback {
	callbacks := make([]*callback, 0, len(cs))
	for _, callback := range cs {
		if nameMap[callback.name] {
			continue
		}
		callbacks = append(callbacks, callback)
	}
	return callbacks