d when the
command is completed.</li>
<li><strong>outcb</strong> – Optional function to be called when
standard output is received. Any returned value
is written to the submit output widget, otherwise that widget
will be empty when this is used.</li>
<li><strong>cachename</strong> – Optional. Name of the tool or other unique
name that will be used for the cache directory.</li>
<li><strong>cachecb</strong> – Optional function to call when the cache is cleared.</li>
<li><strong>width</strong> – Defaul