:Map[(String,String),String]):(T,Integer,String)" title="Permalink">
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    </span>
      <span class="modifier_kind">
        <span class="modifier">abstract </span>
        <span class="kind">def</span>
      </span>
      <span class="symbol">
        <span class="name">query</span><span class="params">(<span name="sources">sources: <span class="extype" name="scala.collection.mutable.Set">Set</span>[(<span class="extype" name="scala.collection.mutable.Has