Align with the original Demangler

Package.swift

@@ -115,6 +115,7 @@ let package = Package(
         .package(url: "https://github.com/p-x9/swift-fileio.git", from: "0.9.0"),
         .package(url: "https://github.com/apple/swift-argument-parser", from: "1.5.1"),
         .package(url: "https://github.com/onevcat/Rainbow", from: "4.0.0"),
+        .package(url: "https://github.com/Mx-Iris/FrameworkToolbox", from: "0.3.0"),
     ],
     targets: [
         .target(
@@ -125,6 +126,7 @@ let package = Package(
             name: "Demangle",
             dependencies: [
                 "Semantic",
+                .product(name: "FoundationToolbox", package: "FrameworkToolbox"),
             ]
         ),
 

Sources/Demangle/Main/Node/Node+ChildrenBuilder.swift

@@ -0,0 +1,8 @@
+import Foundation
+import FoundationToolbox
+
+extension Node {
+    package convenience init(kind: Kind, contents: Contents = .none, @ArrayBuilder<Node> childrenBuilder: () -> [Node]) {
+        self.init(kind: kind, contents: contents, children: childrenBuilder())
+    }
+}