sO metaGet(IMeta o, O key) {
  ret metaMapGet(o, key);
}

sO metaGet(O o, O key) {
  ret metaMapGet(o, key);
}

sO mapMethodLike metaGet(S key, IMeta o) {
  ret metaMapGet(o, key);
}

sO metaGet(S key, O o) {
  ret metaMapGet(o, key);
}