core review fixes.
core review fixes.

lyft/SwiftLint,realm/SwiftLint,victorpimentel/SwiftLint,victorpimentel/SwiftLint,firebase/SwiftLint,realm/SwiftLint,lyft/SwiftLint,realm/SwiftLint,victorpimentel/SwiftLint,lyft/SwiftLint,firebase/SwiftLint,lyft/SwiftLint,firebase/SwiftLint,firebase/SwiftLint,realm/SwiftLint,victorpimentel/SwiftLint