// Init represents the structure.
type Init struct {
	done uint32
	m    sync.Mutex
}

// Do is similar to sync.Once.Do - makes one successful
// call to the function. ie, it invokes the function
// if it is not successful yet.
func (l *Init) Do(f func() error) error {
	if atomic.LoadUint32(&l.done) == 0 {
		return l.do(f)
	}
	return nil
}

func (l *Init) do(f func() error) error {

                        },
                        "required": True,
                    },
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",

    "info": {"title": "FastAPI", "version": "0.1.0"},
    "paths": {
        "/app": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {"application/json": {"schema": {}}},
                    }
                },
                "summary": "Read Main",
                "operationId": "read_main_app_get",

                    "summary": "Valid1",
                    "operationId": "valid1_valid1_get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "500": {
                            "description": "Internal Server Error",

                    "summary": "Get Users",
                    "operationId": "get_users_users__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                }
            },
            "/users/{user_id}": {

                            "in": "query",
                        }
                    ],
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",

        "paths": {
            "/items/": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                    "tags": ["items"],
                    "summary": "Read Items",

                    "responses": {
                        "200": {
                            "content": {"application/json": {"schema": {}}},
                            "description": "Successful Response",
                        }
                    },
                    "summary": "A",
                }
            },
            "/b": {
                "get": {

                                    }
                                }
                            },
                        },
                        "200": {
                            "description": "Successful Response",
                            "content": {"application/vnd.api+json": {"schema": {}}},
                        },
                    },
                    "summary": "A",

                                    }
                                }
                            },
                        },
                        "200": {"description": "Successful Response"},
                    },
                    "summary": "A",
                    "operationId": "a_a_get",
                }
            },
            "/b": {
                "get": {