v0.2.55..v0.2.56 changeset CompletelyContainedByMapElementVisitor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/CompletelyContainedByMapElementVisitor.h b/hoot-core/src/main/cpp/hoot/core/visitors/CompletelyContainedByMapElementVisitor.h
index b03979d..00905b4 100644
--- a/hoot-core/src/main/cpp/hoot/core/visitors/CompletelyContainedByMapElementVisitor.h
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/CompletelyContainedByMapElementVisitor.h
@@ -55,6 +55,7 @@ public:
   static std::string className() { return "hoot::CompletelyContainedByMapElementVisitor"; }
 
   CompletelyContainedByMapElementVisitor();
+  virtual ~CompletelyContainedByMapElementVisitor() = default;
 
   /**
    * Returns true if all the children of this element are available within the specified map.