Function feed_with_sources 

pub fn feed_with_sources(
    key: KeyEvent,
    buffer: &mut String,
    cursor: &mut usize,
    history_index: &mut Option<usize>,
    tab_state: &mut TabState,
    history: &CommandHistory,
    cwd: &Path,
    is_shell: bool,
    sources: &CompletionSources<'_>,
) -> FeedResult

Same as feed, but completion also offers plugin action names and bookmarks.