true
iff {@link #performOk()} may be called. Apreference block may, for example, return false
if some user supplied value is not valid (and validation is an expensive operation, use {@link IPreferenceStatusMonitor} to report validationresults on-the-fly). A preference block may also request additional user input and cancel the initiated {@link #performOk()}, based on that input. Note that this method is guaranteed to be called only on an enabled spelling engine, any spelling engine should be prepared to store its settings on {@link #performOk()} without a preceding call to thismethod.
@returntrue
iff performOk()
may becalled
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