ASCII Tree Graph Generator

{
    "name": "lambda-exp",
    "children": [
        {
            "label": "bound-var",
            "name": "x"
        },
        {
            "label": "body",
            "name": "lambda-exp",
            "children": [
                {
                    "label": "bound-var",
                    "name": "y"
                },
                {
                    "label": "body",
                    "name": "app-exp",
                    "children": [
                        {
                            "label": "rator",
                            "name": "lambda-exp",
                            "children": [
                                {
                                    "label": "bound-var",
                                    "name": "x"
                                },
                                {
                                    "label": "body",
                                    "name": "app-exp",
                                    "children": [
                                        {
                                            "label": "rator",
                                            "name": "var-exp",
                                            "children": [
                                                {
                                                    "label": "var",
                                                    "name": "x"
                                                }
                                            ]
                                        },
                                        {
                                            "label": "rand",
                                            "name": "var-exp",
                                            "children": [
                                                {
                                                    "label": "var",
                                                    "name": "y"
                                                }
                                            ]
                                        }
                                    ]
                                }
                            ]
                        },
                        {
                            "label": "rand",
                            "name": "var-exp",
                            "children": [
                                {
                                    "label": "var",
                                    "name": "x"
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}