Working with Source Control 
Visual Composer in SAP NetWeaver Developer Studio allows you to store your models either in a local repository or in source control.
Note
To use the Design Time Repository (DTR) as your source control, you must import one or more Development Configurations from the System Landscape Directory (SLD) into the SAP NetWeaver Developer Studio
Source control allows you to maintain different versions of models. It contains models that you create within the source control.
To get the latest version of a development component into the model browser, you must synchronize it. To modify a model that is stored in source control, you must check out the model. When you have finished modifying, you must check in the model to allow other users to work on it. To cancel the changes that you have made to a model, you must revert to the last checked-in version of the model.