@Override
      public boolean qualifies(final NodeType node) {
        return !filter.qualifies(node);
      }
Creates a filter that negates another filter.

@param <NodeType> The type of the nodes that are filtered by the returned filter.
@param filter The filter that's negated.
@return A filter that negates the input filter.
java/zylib/src/main/java/com/google/security/zynamics/zylib/gui/zygraph/helpers/StandardFilters.java