move oneOfEachKind

Author: David Ungar

Sources/SwiftDriver/IncrementalCompilation/DependencyGraphDotFileWriter.swift

@@ -162,6 +162,16 @@ fileprivate extension DependencyKey.Designator {
       return .triangle
     }
   }
+
+  static let oneOfEachKind: [DependencyKey.Designator] = [
+      .topLevel(name: ""),
+      .dynamicLookup(name: ""),
+      .externalDepend(try! ExternalDependency(".")),
+      .sourceFileProvide(name: ""),
+      .nominal(context: ""),
+      .potentialMember(context: ""),
+      .member(context: "", name: "")
+  ]
 }
 
 // MARK: - writing one dot file

Sources/SwiftDriver/IncrementalCompilation/DependencyKey.swift

@@ -195,16 +195,6 @@ public struct DependencyKey: Hashable, CustomStringConvertible {
     /// `name` field corresponds to the *unmangled* name of the member.
     case member(context: String, name: String)
 
-    public static let oneOfEachKind: [Designator] = [
-        .topLevel(name: ""),
-        .dynamicLookup(name: ""),
-        .externalDepend(try! ExternalDependency(".")),
-        .sourceFileProvide(name: ""),
-        .nominal(context: ""),
-        .potentialMember(context: ""),
-        .member(context: "", name: "")
-    ]
-
     var externalDependency: ExternalDependency? {
       switch self {
       case let .externalDepend(externalDependency):