CLHS: Section 9.1.4.2.3

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## 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.

The following X3J13 cleanup issue, not part of the specification, applies to this section:

- CONDITION-RESTARTS:PERMIT-ASSOCIATION

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