code: public boolean deleteEdgeReference(AtlasEdge edge, TypeCategory typeCategory, boolean isOwned,
                                         boolean forceDeleteStructTrait) throws AtlasBaseException {
  
          // default edge direction is outward
          return deleteEdgeReference(edge, typeCategory, isOwned, forceDeleteStructTrait, AtlasRelationshipEdgeDirection.OUT);
      }
docs: Force delete is used to remove struct/trait in case of entity updates
  @param edge
  @param typeCategory
  @param isOwned
  @param forceDeleteStructTrait
  @return returns true if the edge reference is hard deleted
  @throws AtlasException