var int64Value: Int64 { get }
s13JavaScriptKit16JSBigIntExtendedP10int64Values5Int64Vvp
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import JavaScriptKit
protocol JSBigIntExtended : JSBigInt
@frozen struct Int64
A 64-bit signed integer value type.
init(_ value: Int64)
init(unsigned value: UInt64)
var uInt64Value: UInt64 { get }