grc/misc_utils/gsm_wireshark_sink.xml

<?xml version="1.0"?>
<block>
  <name>wireshark_sink</name>
  <key>gsm_wireshark_sink</key>
  <category>gsm</category>
  <import>import gsm</import>
  <make>gsm.wireshark_sink()</make>

  <sink>
    <name>msgs</name>
    <type>message</type>
  </sink>
</block>