@frozen
public struct NormalDistribution<T: BinaryFloatingPoint>: RandomDistribution
where T.RawSignificand: FixedWidthInteger
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public let mean: T
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public let standardDeviation: T
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public init(mean: T = 0, standardDeviation: T = 1)
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public func next<G>(using rng: inout G) -> T where G : RandomNumberGenerator