 			" and parameters \(evaluation.parameters)"
 		)
 	}
-
-	func testMarkdownExample() {
-		func echo(evaluation: Command.Evaluation) throws {
-			print(
-				"\(evaluation.name) evaluated with " +
-				"options: \(evaluation.options) " +
-				"and parameters \(evaluation.parameters)"
-			)
-		}
-
-		let swiftCommand =
+	
+	let swiftCommand =
 		Command.Description(
 			name: "swift",
 			overview: "Swift Program",
-			callback: echo,
+			callback: nil,
 			options: [],
 			subCommands: [
 				Command.Description(
 					name: "package",
 					overview: "Perform operations on Swift packages",
-					callback: echo,
+					callback: nil,
 					options: [
 						Option.Description(
 							flag: .both(short: "v", long: "verbose"),

							subCommands: [])
					])
			])

		// args normally is CommandLine.arguments
		do {

						Command.Description(
							name: "update",
							overview: "Update package dependencies",
							callback: nil,
							options: [
								Option.Description(
									flag: .long("repin"),
