ss="param">description</dt><dd class="cmt"><p>human-readable description of this backend. Optional</p></dd><dt class="param">metadata</dt><dd class="cmt"><p>arbitrary user-defined machine-readable data of this backend. Optional</p></dd><dt class="param">backends</dt><dd class="cmt"><p>the ids of the child backends in order</p></dd></dl><div class="toggleContainer"><div class="toggle block"><span>Linear Supertypes</span><div class="superTypes hiddenContent"><span name="java.io.Serializable" class="extype">Se