@Nullable
    public Long getLong(int pos) {
        final Number n = getNumber(pos);
        return n == null ? null : n.longValue();
    }
Retrieves an out parameter as a Long object.

@param pos The out parameter index
@return The value as an Long object. Can be null.
core/src/main/java/org/jdbi/v3/core/statement/OutParameters.java