code: public static Bson type(final String fieldName, final BsonType type) {
          return new OperatorFilter<BsonInt32>("$type", fieldName, new BsonInt32(type.getValue()));
      }
docs: Creates a filter that matches all documents where the value of the field is of the specified BSON type.
  
  @param fieldName the field name
  @param type      the BSON type
  @return the filter
  @mongodb.driver.manual reference/operator/query/type $type