Description
As noted by frm at https://twitter.com/frm1025/status/1161640994787536896, javadoc of IndexCopier#waitForCopyCompletion shouldn't talk about false return when the method returns void.
As noted by frm at https://twitter.com/frm1025/status/1161640994787536896, javadoc of IndexCopier#waitForCopyCompletion shouldn't talk about false return when the method returns void.