JRule - openHAB Rules using Java

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my concrete example

@JRuleName("init_DI_LED16")
@JRuleWhen(item = _BT_SW_LED16_TOGGLER.ITEM, trigger = _BT_SW_LED16_TOGGLER.TRIGGER_RECEIVED_COMMAND)
public void init_DI_LED16(final JRuleEvent event) {
    _G_DI.members().stream()
        .filter(memberItemName -> memberItemName.startsWith("DI_LED16_"))
        .map(memberItemName -> itemRegistry.getItem(memberItemName)) // <--- how get an item by its name?
        .forEach(memberItem -> {
            if (memberItem.state == "LED_OFF") {                               //<--- use state of member item identified by name
                ...
                sendCommand(memberItemName, "LED_RED")
            }
        }
    }
}

where _G_DI is a group of LEDs.

If it is possible to send a command/update the state of an item identified by its name it should also be possible to read the item state by its name.

I could introduce more groups and use operations on these groups (intersections, slices, …) but this does not feel natural to me.

See Design Pattern: Associated Items