interface lsp {
    /// An LSP completion.
    record completion {
        label: string,
        detail: option<string>,
        kind: option<completion-kind>,
        insert-text-format: option<insert-text-format>,
    }

    variant completion-kind {
        text,
        method,
        function,
        %constructor,
        field,
        variable,
        class,
        %interface,
        module,
        property,
        unit,
        value,
        %enum,
        keyword,
        snippet,
        color,
        file,
        reference,
        folder,
        enum-member,
        constant,
        struct,
        event,
        operator,
        type-parameter,
        other(s32),
    }

    variant insert-text-format {
        plain-text,
        snippet,
        other(s32),
    }
}