Checks whether a key is supported in the LEADVIEW version being run.
key
Binding key to check.
A boolean value indicating whether the key is supported.
The isSupported method will check and see whether a key is supported in the version of LEADVIEW that you are running. Any string value can be added to the manager via add, but a key is only considered supported if it is consumed by an internal LEADVIEW component.
For an example, refer to BindingManager.