Physics Builder Tools > Physics and Multiphysics Interfaces > Contained Interface

Contained Interface
The Contained Interface () is actually a link node, similar to the Feature Link and Property Link nodes. The difference is that you do not choose an item from the Building Blocks branch but among the available physics interfaces.
Right-click the Multiphysics Interface node to add this feature from the context menu.
The Settings window has the following sections:
Source Interface
In the Links from list choose where to look for a certain interface:
Local interfaces (the default). Choose from the interfaces defined in the same file. Choose the interface from the Link list.
Built in. Choose from built-in physics interfaces available to the Physics Builder. Select the main resource (COMSOL product) from the Package list. For each resource, choose an interface from the Link list. Only the currently published interfaces are available.
External resources. Choose from the interfaces found in an imported builder file under the External Resources branch. Choose the file from the Imported file list. The Link list contains all interfaces found in the selected file.
Interface Features
From the Add default features from interface list, choose Default features except those below to add the same default features as the contained interface. Choose Customized to select the default features manually using the buttons under the list. The list can be empty if you do not want to use any default features from this interface.
In the Remove features list, add features from the contained interface that you do not want in the multiphysics interface. Make sure that you do not remove a feature that you use as a default feature.