protected Value<? extends T> calculateOwnPresentValue() {
        Value<? extends T> value = calculateOwnValue(ValueConsumer.IgnoreUnsafeRead);
        if (value.isMissing()) {
            throw new MissingValueException(cannotQueryValueOf(value));
        }

        return value;
    }

    @Override
    public boolean isPresent() {
        return calculatePresence(ValueConsumer.IgnoreUnsafeRead);
    }

        expect:
        !entryProvider.present
        entryProvider.getOrNull() == null

        when:
        entryProvider.get()

        then:
        def e = thrown(MissingValueException)
        e.message == "Cannot query the value of this provider because it has no value available."
    }

    def "entry provider has no value when key is not in map"() {
        given:

        property.getOrNull() == null
        property.getOrElse(toMutable(["other"])) == toMutable(["other"])

        when:
        property.get()

        then:
        def e = thrown(MissingValueException)
        e.message == "Cannot query the value of ${displayName} because it has no value available."
    }

    def "property has no value when set to provider with no value and other values appended"() {