Clears out any cached data associated with the specified account identity/identities.
<p/>
This implementation will return quietly if the principals argument is null or empty. Otherwise it delegates
to {@link #doClearCache(hunt.shiro.subject.PrincipalCollection)}.
@param principals the principals of the account for which to clear any cached data.
Clears out any cached data associated with the specified account identity/identities. <p/> This implementation will return quietly if the principals argument is null or empty. Otherwise it delegates to {@link #doClearCache(hunt.shiro.subject.PrincipalCollection)}.
@param principals the principals of the account for which to clear any cached data.