public double getDoubleValue(int pos) {
        final Number n = getNumber(pos);
        return n == null ? 0.0d : n.doubleValue();
    }
Retrieves an out parameter as a double value.

@param pos The out parameter index
@return The value as an double. Returns 0.0d if the value is absent.
@since 3.43.0
core/src/main/java/org/jdbi/v3/core/statement/OutParameters.java