Added some methods to check visibility of models
Added some methods to check visibility of models


Former-commit-id: 2d719400a0a35647c10cb37074db9d890060aac6
reuven/modelingcommons,reuven/modelingcommons,reuven/modelingcommons,reuven/modelingcommons,reuven/modelingcommons,reuven/modelingcommons,reuven/modelingcommons