## session NewSession(`u32`) - **interface**: `session.NewSession` - **summary**: New session has happened. Note that the argument is the session index, not the block number as the type might suggest. ValidatorDisabled(`AccountId32`) - **interface**: `session.ValidatorDisabled` - **summary**: Validator has been disabled. ValidatorReenabled(`AccountId32`) - **interface**: `session.ValidatorReenabled` - **summary**: Validator has been re-enabled.