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Instance Method

withUnsafeMutableBytes(_:)

iOS 8.0+ iPadOS 8.0+ Mac Catalyst 8.0+ macOS 10.10+ tvOS 9.0+ watchOS 2.0+ 
mutating func withUnsafeMutableBytes<E, ResultType>(_ body: (UnsafeMutableRawBufferPointer) throws(E) -> ResultType) throws(E) -> ResultType where E : Error, ResultType : ~Copyable