fun foo(x: MutableList<String>) {
    x.<caret>
}

// EXIST: {"lookupString":"stream","tailText":"()","typeText":"Stream<String!>!"}
// EXIST: {"lookupString":"removeIf","tailText":"(Predicate<in String!>!)","typeText":"Boolean"}
// EXIST: {"lookupString":"removeIf","tailText":" {...} (((String!) -> Boolean)!)","typeText":"Boolean"}