driver-core/src/main/com/mongodb/client/model/Updates.java
public static <TItem> Bson pushEach(final String fieldName, final List<TItem> values) {
        return new PushUpdate<TItem>(fieldName, values, new PushOptions());
    }
public static <TItem> Bson pushEach(final String fieldName, final List<TItem> values) {
        return new PushUpdate<TItem>(fieldName, values, new PushOptions());
    }
Creates an update that adds each of the given values to the array value of the field with the given name.

@param fieldName the non-null field name
@param values    the values
@param <TItem>   the value type
@return the update
@mongodb.driver.manual reference/operator/update/push/ $push