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+<?xml version="1.0"?>
+<!--
+###################################################
+##Variable block: a grc variable with key, value
+###################################################
+ -->
+<block>
+ <name>Variable</name>
+ <key>variable</key>
+ <var_make>self.$(id) = $(id) = $value</var_make>
+ <make></make>
+ <callback>self.set_$(id)($value)</callback>
+ <param>
+ <name>Value</name>
+ <key>value</key>
+ <value>0</value>
+ <type>raw</type>
+ </param>
+ <doc>
+This block maps a value to a unique variable. \
+This variable block has no graphical representation.
+ </doc>
+</block>