```sh
result = set_clear handle
```
Clears the provided set.
The set handle.
True if successful.
```sh
handle = set
result = set_put ${handle} 1
result = set_is_empty ${handle}
assert_false ${result}
result set_clear ${handle}
assert ${result}
result = set_is_empty ${handle}
assert ${result}
release ${handle}
```