<value>2</value>
<type>int</type>
</param>
+ <param>
+ <name>Num Ports</name>
+ <key>num_ports</key>
+ <value>1</value>
+ <type>int</type>
+ </param>
+ <check>$num_ports > 0</check>
<sink>
<name>in</name>
<type>$in_type</type>
+ <nports>$num_ports</nports>
</sink>
<source>
<name>out</name>
<type>$out_type</type>
+ <nports>$num_ports</nports>
</source>
</block>