FunctionBuilderDemo

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@_functionBuilder

support:

• buildBlock
• buildIf
• buildEither(left)
• buildEither(right)
• buildExpression
• buildDo

XCode Version 11.4 (11E146) bug:

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swift Trunk Development 2020/04/17

• fix XCode Version 11.4 (11E146) bug
• support buildFinalResult

public static func buildFinalResult(_ value: String) -> String {
    return ".result(\(value))"
}