{
  "type": "File",
  "start": 0,
  "end": 49,
  "loc": {
    "start": {
      "line": 1,
      "column": 0
    },
    "end": {
      "line": 1,
      "column": 49
    }
  },
  "program": {
    "type": "Program",
    "start": 0,
    "end": 49,
    "loc": {
      "start": {
        "line": 1,
        "column": 0
      },
      "end": {
        "line": 1,
        "column": 49
      }
    },
    "sourceType": "module",
    "interpreter": null,
    "body": [
      {
        "type": "ClassDeclaration",
        "start": 0,
        "end": 49,
        "loc": {
          "start": {
            "line": 1,
            "column": 0
          },
          "end": {
            "line": 1,
            "column": 49
          }
        },
        "id": {
          "type": "Identifier",
          "start": 6,
          "end": 11,
          "loc": {
            "start": {
              "line": 1,
              "column": 6
            },
            "end": {
              "line": 1,
              "column": 11
            },
            "identifierName": "Array"
          },
          "name": "Array"
        },
        "superClass": null,
        "body": {
          "type": "ClassBody",
          "start": 12,
          "end": 49,
          "loc": {
            "start": {
              "line": 1,
              "column": 12
            },
            "end": {
              "line": 1,
              "column": 49
            }
          },
          "body": [
            {
              "type": "ClassMethod",
              "start": 14,
              "end": 46,
              "loc": {
                "start": {
                  "line": 1,
                  "column": 14
                },
                "end": {
                  "line": 1,
                  "column": 46
                }
              },
              "static": false,
              "key": {
                "type": "Identifier",
                "start": 14,
                "end": 20,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 14
                  },
                  "end": {
                    "line": 1,
                    "column": 20
                  },
                  "identifierName": "concat"
                },
                "name": "concat"
              },
              "computed": false,
              "kind": "method",
              "id": null,
              "generator": false,
              "async": false,
              "params": [
                {
                  "type": "Identifier",
                  "start": 21,
                  "end": 42,
                  "loc": {
                    "start": {
                      "line": 1,
                      "column": 21
                    },
                    "end": {
                      "line": 1,
                      "column": 42
                    },
                    "identifierName": "items"
                  },
                  "name": "items",
                  "typeAnnotation": {
                    "type": "TypeAnnotation",
                    "start": 26,
                    "end": 42,
                    "loc": {
                      "start": {
                        "line": 1,
                        "column": 26
                      },
                      "end": {
                        "line": 1,
                        "column": 42
                      }
                    },
                    "typeAnnotation": {
                      "type": "UnionTypeAnnotation",
                      "start": 27,
                      "end": 42,
                      "loc": {
                        "start": {
                          "line": 1,
                          "column": 27
                        },
                        "end": {
                          "line": 1,
                          "column": 42
                        }
                      },
                      "types": [
                        {
                          "type": "NumberTypeAnnotation",
                          "start": 27,
                          "end": 33,
                          "loc": {
                            "start": {
                              "line": 1,
                              "column": 27
                            },
                            "end": {
                              "line": 1,
                              "column": 33
                            }
                          }
                        },
                        {
                          "type": "StringTypeAnnotation",
                          "start": 36,
                          "end": 42,
                          "loc": {
                            "start": {
                              "line": 1,
                              "column": 36
                            },
                            "end": {
                              "line": 1,
                              "column": 42
                            }
                          }
                        }
                      ]
                    }
                  }
                }
              ],
              "body": {
                "type": "BlockStatement",
                "start": 44,
                "end": 46,
                "loc": {
                  "start": {
                    "line": 1,
                    "column": 44
                  },
                  "end": {
                    "line": 1,
                    "column": 46
                  }
                },
                "body": [],
                "directives": []
              }
            }
          ]
        }
      }
    ],
    "directives": []
  }
}