Currently WhitelistSanitization does not allow for partial whitelisting of objects inside an array. For example, if the schema has a field of type Array, whose elements are Structs with fields a, b and c; then WhitelistSanitization can currently either whitelist whole array elements (with a, b and c fields), or not whitelist the whole Array field. But it can currently not partially whitelist the fields of the Array elements (i.e. keep a and b, and delete c).