[Question] How to create rule so that some fields can depend on other(s)?

[JeremieBergeron]

Is there a way to create a rule so that some fields can depend on each other?
For example, if c=10, then b is a random number and a is regex="[a-zA-Z]THE_B_VARIABLE[a-zA-Z]"?

If it isn't possible to create this kinds of rules, is it possible to generate some random values for the field d, but not for a, b and c? I tried to add a arg.properties that doesn't specify a value for the d column, but it doesn't work;

{
    "namespace": "datagen.example",
    "name": "users",
    "type": "record",
    "fields": [
        {
            "name": "a",
            "type": "string"
        },
        {
            "name": "b",
            "type": "int"
        },
        {
            "name": "c",
            "type": "int"
        },
        {
            "name": "d",
            "type": {
                "type": "string",
                "arg.properties": {
                    "regex": "[1-9][0-9]",
                    "length": 2
                }
            }
        }
    ],
    "arg.properties": {
        "options": [
            {
                "a": "XXX20XXX",
                "b": 20,
                "c": 10
            },
            {
                "a": "XXX25XXX",
                "b": 25,
                "c": 10
            },
            {
                "a": "QWERTY",
                "b": 90978,
                "c": 6
            }
        ]
    }
}