}

    def "returning null from replace unsets the property"() {
        given:
        property.set(someValue())

        when:
        property.replace { null }

        then:
        !property.isPresent()
    }

    def "returning null from replace unsets the property falling back to convention"() {
        given:

    }

    def "returning null from replace unsets the property"() {
        given:
        property.set(someValue())

        when:
        property.replace { null }

        then:
        !property.isPresent()
    }

    def "returning null from replace unsets the property falling back to convention"() {
        given:

		// | ResourceVersion | AllowWatchBookmarks | SendInitialEvents     |
		// +=================+=====================+=======================+
		// | Unset           | true/false          | nil/true/false        |
		// +-----------------+---------------------+-----------------------+
		{
			name: "RV=unset, allowWatchBookmarks=true, sendInitialEvents=nil",
			opts: listOptions(true, nil, ""),

     * [proxyAuthenticator] to set the authenticator for proxy servers.
     *
     * If unset, the [no authentication will be attempted][Authenticator.NONE].
     */
    fun authenticator(authenticator: Authenticator) =
      apply {
        this.authenticator = authenticator
      }

    /** Configure this client to follow redirects. If unset, redirects will be followed. */
    fun followRedirects(followRedirects: Boolean) =

  //
  // - If `paramKind` is cluster-scoped, this field MUST be unset. Setting this
  // field results in a configuration error.
  //
  // - If `paramKind` is namespace-scoped, the namespace of the object being
  // evaluated for admission will be used when this field is left unset. Take
  // care that if this is left empty the binding must not match any cluster-scoped

	// line breaks. The message must not contain line breaks.
	// If unset, the message is "failed rule: {Rule}".
	// e.g. "must be a URL with the host matching spec.host"
	// If ExpressMessage is specified, Message will be ignored
	// If the Expression contains line breaks. Eith Message or ExpressMessage is required.
	// The message must not contain line breaks.
	// If unset, the message is "failed Expression: {Expression}".
	// +optional

  //
  // - If `paramKind` is cluster-scoped, this field MUST be unset. Setting this
  // field results in a configuration error.
  //
  // - If `paramKind` is namespace-scoped, the namespace of the object being
  // evaluated for admission will be used when this field is left unset. Take
  // care that if this is left empty the binding must not match any cluster-scoped

        collection.from as List == ["src1", "src3", "src4"]
    }

    def "can unset convention"() {
        given:
        collection.convention("src0")
        assert !collection.explicit

        expect:
        collection.setFrom("src1")
        assert collection.explicit

        when:
        collection.unset()

        then:
        assert !collection.explicit

	// line breaks. The message must not contain line breaks.
	// If unset, the message is "failed rule: {Rule}".
	// e.g. "must be a URL with the host matching spec.host"
	// If the Expression contains line breaks. Message is required.
	// The message must not contain line breaks.
	// If unset, the message is "failed Expression: {Expression}".
	// +optional

	// line breaks. The message must not contain line breaks.
	// If unset, the message is "failed rule: {Rule}".
	// e.g. "must be a URL with the host matching spec.host"
	// If the Expression contains line breaks. Message is required.
	// The message must not contain line breaks.
	// If unset, the message is "failed Expression: {Expression}".
	// +optional