grc/gsm_extract_system_info.xml

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

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

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