FilterContains checks whether the completion.Text contains sub.

FilterFuzzy checks whether the completion.Text fuzzy matches sub.

FilterHasPrefix checks whether the string completions.Text begins with sub.

FilterHasSuffix checks whether the completion.Text ends with sub.

NewCompletionManager returns initialized CompletionManager object.

CompletionManager manages which suggestion is now selected.

Suggest is printed when completing.

Filter is the type to filter the prompt.Suggestion array.