use iter::{AdditiveIterator, DoubleEndedIterator, Extendable, Iterator, Map};
use mem;
use option::{Option, Some, None};
-use slice::{Vector, ImmutableVector};
+use slice::{Vector, ImmutableSlice};
use str::{CharSplits, Str, StrAllocating, StrVector, StrSlice};
use string::String;
use unicode::char::UnicodeChar;