How to use the @babel/traverse.NodePath.get function in @babel/traverse

try {
		var ast = babylon.parse(code, { sourceFilename: file, sourceType: 'unambiguous' });

		const hub = new Hub();
		hub.buildError = function (node, message, Error) {
			const loc = node && node.loc;
			const err = new Error(message);

			if (loc) {
				err.loc = loc.start;
			}

			return err;
		};
		const path = NodePath.get({
			hub: hub,
			parent: ast,
			container: ast,
			key: 'program'
		}).setContext();
		traverse(ast, {
			enter: function(path) {
				if (types.isAssignmentExpression(path.node) && isBaseControllerExportExpression(path.node.left)) {
					// what's equivalent of print_to_string()? I replaced with simple value property assuming it's a string literal
					baseController = '\'' + path.node.right.value + '\'';
				}
			},

			ImportDeclaration: function(path) {
				moduleCodes += generate(path.node, GENCODE_OPTIONS).code;
				path.remove();

constructor(options: {}, { code, ast, inputMap }: NormalizedFile) {
    this.opts = options;
    this.code = code;
    this.ast = ast;
    this.inputMap = inputMap;

    this.path = NodePath.get({
      hub: this.hub,
      parentPath: null,
      parent: this.ast,
      container: this.ast,
      key: "program",
    }).setContext();
    this.scope = this.path.scope;
  }