{
  "type": "Script",
  "span": {
    "start": 17,
    "end": 78,
    "ctxt": 0
  },
  "body": [
    {
      "type": "VariableDeclaration",
      "span": {
        "start": 17,
        "end": 48,
        "ctxt": 0
      },
      "kind": "let",
      "declare": true,
      "declarations": [
        {
          "type": "VariableDeclarator",
          "span": {
            "start": 29,
            "end": 47,
            "ctxt": 0
          },
          "id": {
            "type": "Identifier",
            "span": {
              "start": 29,
              "end": 30,
              "ctxt": 0
            },
            "value": "x",
            "optional": false,
            "typeAnnotation": {
              "type": "TsTypeAnnotation",
              "span": {
                "start": 30,
                "end": 47,
                "ctxt": 0
              },
              "typeAnnotation": {
                "type": "TsTypeLiteral",
                "span": {
                  "start": 32,
                  "end": 47,
                  "ctxt": 0
                },
                "members": [
                  {
                    "type": "TsPropertySignature",
                    "span": {
                      "start": 34,
                      "end": 45,
                      "ctxt": 0
                    },
                    "readonly": false,
                    "key": {
                      "type": "Identifier",
                      "span": {
                        "start": 34,
                        "end": 35,
                        "ctxt": 0
                      },
                      "value": "a",
                      "optional": false
                    },
                    "computed": false,
                    "optional": true,
                    "init": null,
                    "params": [],
                    "typeAnnotation": {
                      "type": "TsTypeAnnotation",
                      "span": {
                        "start": 36,
                        "end": 45,
                        "ctxt": 0
                      },
                      "typeAnnotation": {
                        "type": "TsKeywordType",
                        "span": {
                          "start": 38,
                          "end": 45,
                          "ctxt": 0
                        },
                        "kind": "boolean"
                      }
                    },
                    "typeParams": null
                  }
                ]
              }
            }
          },
          "init": null,
          "definite": false
        }
      ]
    },
    {
      "type": "ExpressionStatement",
      "span": {
        "start": 50,
        "end": 63,
        "ctxt": 0
      },
      "expression": {
        "type": "AssignmentExpression",
        "span": {
          "start": 50,
          "end": 62,
          "ctxt": 0
        },
        "operator": "??=",
        "left": {
          "type": "MemberExpression",
          "span": {
            "start": 50,
            "end": 53,
            "ctxt": 0
          },
          "object": {
            "type": "Identifier",
            "span": {
              "start": 50,
              "end": 51,
              "ctxt": 0
            },
            "value": "x",
            "optional": false
          },
          "property": {
            "type": "Identifier",
            "span": {
              "start": 52,
              "end": 53,
              "ctxt": 0
            },
            "value": "a",
            "optional": false
          }
        },
        "right": {
          "type": "BooleanLiteral",
          "span": {
            "start": 58,
            "end": 62,
            "ctxt": 0
          },
          "value": true
        }
      }
    },
    {
      "type": "ExpressionStatement",
      "span": {
        "start": 64,
        "end": 78,
        "ctxt": 0
      },
      "expression": {
        "type": "AssignmentExpression",
        "span": {
          "start": 64,
          "end": 77,
          "ctxt": 0
        },
        "operator": "&&=",
        "left": {
          "type": "MemberExpression",
          "span": {
            "start": 64,
            "end": 67,
            "ctxt": 0
          },
          "object": {
            "type": "Identifier",
            "span": {
              "start": 64,
              "end": 65,
              "ctxt": 0
            },
            "value": "x",
            "optional": false
          },
          "property": {
            "type": "Identifier",
            "span": {
              "start": 66,
              "end": 67,
              "ctxt": 0
            },
            "value": "a",
            "optional": false
          }
        },
        "right": {
          "type": "BooleanLiteral",
          "span": {
            "start": 72,
            "end": 77,
            "ctxt": 0
          },
          "value": false
        }
      }
    }
  ],
  "interpreter": null
}