var name: String? { get set }

var message: String? { get set }

var stack: [JSValue] { get }

var fileName: String? { get }

var lineNumber: Int { get }

var columnNumber: Int { get }

//

//init(_ message: String?, _ fileName: String?, lineNumber: Int?)

init(_ message: String?, _ fileName: String?, lineNumber: JSValue?)

func toSource() -> String

func toString() -> String

public var name: String?

public var message: String?

public var stack: [JSValue] = [JSValue]()

public var fileName: String?

public var lineNumber: Int = 0

public var columnNumber: Int = 0

public required init(_ message: String?, _ fileName: String?, lineNumber: JSValue?) {

self.message = message

self.fileName = fileName

if let lineNumber = lineNumber, lineNumber.isNumber {

self.lineNumber = Int(lineNumber.toUInt32())

}

}

public func toSource() -> String {

return ""

}

public func toString() -> String {

return ""

}

guard isObject else { return false }

if isInstance(of: JSError.self) { return true }

let JSNativeError = context.objectForKeyedSubscript("Error")!

guard JSNativeError.isObject else { return false }

//var jsException: JSValueRef? = nil

//return JSValueIsInstanceOfConstructor(context.jsGlobalContextRef, jsValueRef, JSNativeError.jsValueRef, &jsException)

return JSValueIsInstanceOfConstructor(context.jsGlobalContextRef, jsValueRef, JSNativeError.jsValueRef, nil)