Add a null check.
Add a null check.

mconnew/SourceBrowser,akrisiun/SourceBrowser,akrisiun/SourceBrowser,KirillOsenkov/SourceBrowser,controlflow/SourceBrowser,drose-d2l/SourceBrowser,controlflow/SourceBrowser,controlflow/SourceBrowser,drose-d2l/SourceBrowser,akrisiun/SourceBrowser,mconnew/SourceBrowser,controlflow/SourceBrowser,mconnew/SourceBrowser,KirillOsenkov/SourceBrowser,drose-d2l/SourceBrowser,drose-d2l/SourceBrowser,KirillOsenkov/SourceBrowser,mconnew/SourceBrowser,KirillOsenkov/SourceBrowser,akrisiun/SourceBrowser