Esprima

{
    "type": "Program",
    "body": [
        {
            "type": "FunctionDeclaration",
            "id": {
                "type": "Identifier",
                "name": "MyClass"
            },
            "params": [],
            "defaults": [],
            "body": {
                "type": "BlockStatement",
                "body": []
            },
            "rest": null,
            "generator": false,
            "expression": false
        },
        {
            "type": "ExpressionStatement",
            "expression": {
                "type": "AssignmentExpression",
                "operator": "=",
                "left": {
                    "type": "MemberExpression",
                    "computed": false,
                    "object": {
                        "type": "Identifier",
                        "name": "module"
                    },
                    "property": {
                        "type": "Identifier",
                        "name": "exports"
                    }
                },
                "right": {
                    "type": "Identifier",
                    "name": "MyClass"
                }
            }
        },
        {
            "type": "ExpressionStatement",
            "expression": {
                "type": "AssignmentExpression",
                "operator": "=",
                "left": {
                    "type": "MemberExpression",
                    "computed": false,
                    "object": {
                        "type": "Identifier",
                        "name": "MyClass"
                    },
                    "property": {
                        "type": "Identifier",
                        "name": "prototype"
                    }
                },
                "right": {
                    "type": "ObjectExpression",
                    "properties": [
                        {
                            "type": "Property",
                            "key": {
                                "type": "Identifier",
                                "name": "foo"
                            },
                            "value": {
                                "type": "FunctionExpression",
                                "id": null,
                                "params": [
                                    {
                                        "type": "Identifier",
                                        "name": "bar"
                                    }
                                ],
                                "defaults": [],
                                "body": {
                                    "type": "BlockStatement",
                                    "body": [
                                        {
                                            "type": "ReturnStatement",
                                            "argument": {
                                                "type": "Identifier",
                                                "name": "bar"
                                            }
                                        }
                                    ]
                                },
                                "rest": null,
                                "generator": false,
                                "expression": false
                            },
                            "kind": "init"
                        },
                        {
                            "type": "Property",
                            "key": {
                                "type": "Identifier",
                                "name": "bar"
                            },
                            "value": {
                                "type": "FunctionExpression",
                                "id": null,
                                "params": [],
                                "defaults": [],
                                "body": {
                                    "type": "BlockStatement",
                                    "body": [
                                        {
                                            "type": "ExpressionStatement",
                                            "expression": {
                                                "type": "CallExpression",
                                                "callee": {
                                                    "type": "MemberExpression",
                                                    "computed": false,
                                                    "object": {
                                                        "type": "ThisExpression"
                                                    },
                                                    "property": {
                                                        "type": "Identifier",
                                                        "name": "foo"
                                                    }
                                                },
                                                "arguments": []
                                            }
                                        }
                                    ]
                                },
                                "rest": null,
                                "generator": false,
                                "expression": false
                            },
                            "kind": "init"
                        }
                    ]
                }
            }
        }
    ]
}