|   alternation
()  grouping
[]  option (0 or 1 times)
{}  repetition (0 to n times)
</pre>

<p>
Lower-case production names are used to identify lexical tokens.
Non-terminals are in CamelCase. Lexical tokens are enclosed in
double quotes <code>""</code> or back quotes <code>``</code>.
</p>

<p>
The form <code>a … b</code> represents the set of characters from
<code>a</code> through <code>b</code> as alternatives. The horizontal

     * CloseableList}, but it has not yet run. The {@link CloseableList} may not be subsumed.
     */
    WILL_CLOSE,

    /**
     * The callback that closes the {@link CloseableList} is running, but it has not completed. The
     * {@link CloseableList} may not be subsumed.
     */
    CLOSING,