Fix Flow's maybe-type conversion
Fix Flow's maybe-type conversion
georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,magny/DefinitelyTyped,borisyankov/DefinitelyTyped,magny/DefinitelyTyped