lib/namespace.js
function slice(toToken) {
    if (has(toToken) && !isLast(toToken)) {
        _tokens = _tokens.slice(0, _tokens.lastIndexOf(toToken) + 1);
    }
}
function slice(toToken) {
    if (has(toToken) && !isLast(toToken)) {
        _tokens = _tokens.slice(0, _tokens.lastIndexOf(toToken) + 1);
    }
}
function slice ( toToken ) { if ( has ( toToken ) && ! isLast ( toToken ) ) { _tokens = _tokens . slice ( 0 , _tokens . lastIndexOf ( toToken ) + 1 ) ; } }
removes last tokens, up to and not including the specified token.
@param toToken the token to back into (exclusive!)
removes last tokens up to and not including the specified token .