How to check all Keys in JSON are camelcase , for below request , containing Array of objects

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I’m not sure of the full context about why you need to check for camelcase but could you just validate the response against a schema to cover that too?

let schema = {
    "type": "object",
    "required": [
        "success",
        "data",
        "numberOfElements",
        "totalPages",
        "totalElements",
        "pageNumber",
        "pageSize"
    ],
    "properties": {
        "success": {
            "type": "boolean"
        },
        "data": {
            "type": "array",
            "items": {
                "anyOf": [
                    {
                        "type": "object",
                        "required": [
                            "requestUuid",
                            "messages",
                            "active",
                            "objectValid",
                            "success",
                            "validated",
                            "isNew"
                        ],
                        "properties": {
                            "requestUuid": {
                                "type": "string"
                            },
                            "messages": {
                                "type": "array",
                                "items": {
                                    "anyOf": [
                                        {
                                            "type": "object",
                                            "required": [
                                                "messageType",
                                                "messageCode",
                                                "messageDisplayText",
                                                "priority"
                                            ],
                                            "properties": {
                                                "messageType": {
                                                    "type": "string"
                                                },
                                                "messageCode": {
                                                    "type": "string"
                                                },
                                                "messageDisplayText": {

                                                    "type": "string"
                                                },
                                                "priority": {
                                                    "type": "integer"
                                                }
                                            }
                                        }
                                    ]
                                }
                            },
                            "active": {
                                "type": "boolean"
                            },
                            "objectValid": {
                                "type": "boolean"
                            },
                            "success": {
                                "type": "boolean"
                            },
                            "validated": {
                                "type": "boolean"
                            },
                            "isNew": {
                                "type": "boolean"
                            }
                        }
                    }
                ]
            }
        },
        "numberOfElements": {
            "type": "integer"
        },
        "totalPages": {
            "type": "integer"
        },
        "totalElements": {
            "type": "integer"
        },
        "pageNumber": {
            "type": "integer"
        },
        "pageSize": {
            "type": "integer"
        }
    }
}

pm.test("Schema is valid", () => {
    pm.response.to.have.jsonSchema(schema)
})