">always</span><span class="hspace">&nbsp;</span><span class="RktVal">'</span><span class="RktVal">sometimes</span><span class="hspace">&nbsp;</span><span class="RktVal">'</span><span class="RktVal">request</span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace">&nbsp;&nbsp;</span><span class="RktVar">caps</span><span class="hspace">&nbsp;</span>:<span class="hspace">&nbsp;</span><span class="RktSym"><a href="Capabilities.html#%28def._%28%28lib._gstreamer%2Fmain..rkt%29._caps~3f%29%29" clas