The <option>-fwarn-import-lists</option> flag will warn about the import
of <literal>Y</literal> but not <literal>X</literal>
If module <literal>Y</literal> is later changed to export (say) <literal>f</literal>,
The <option>-fwarn-import-lists</option> flag will warn about the import
of <literal>Y</literal> but not <literal>X</literal>
If module <literal>Y</literal> is later changed to export (say) <literal>f</literal>,