9 Conditions   9.1 Condition System Concepts   9.1.4 Signaling and Handling Conditions   9.1.4.2 Restarts

9.1.4.2.3 Restart Tests

Each restart has an associated test, which is a function of one argument (a condition or nil) which returns true if the restart should be visible in the current situation. This test is created by the :test-function option to restart-bind or the :test option to restart-case.