Add Missing Import

Restored an import that was lost during a backport

Issue gh-4183
This commit is contained in:
Josh Cummings 2020-03-27 15:07:57 -06:00
parent a44225d334
commit f82e435aaf
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@ -17,6 +17,7 @@
package org.springframework.security.web.authentication.switchuser;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.servlet.FilterChain;