Is it possible to disable null values from firebase events in Big Query?

Question

Is it possible to disable or completely ignore the null values in BigQuery that come from firebase events of a (mobile) app?

Example:

key => my_custom_firebase_event:

value => {"string_value": null, "int_value": "123456789", "doube_value":null}

Preferred:

value => {"int_value": "123456789"}