How to use the @pnp/spfx-property-controls/lib/PropertyFieldCollectionData.CustomCollectionFieldType.dropdown function in @pnp/spfx-property-controls

panelHeader: strings.ResultTypes.EditResultTypesLabel,
                    panelDescription: strings.ResultTypes.ResultTypesDescription,
                    enableSorting: true,
                    label: strings.ResultTypes.ResultTypeslabel,
                    value: this.properties.resultTypes,
                    fields: [
                        {
                            id: 'property',
                            title: strings.ResultTypes.ConditionPropertyLabel,
                            type: CustomCollectionFieldType.string,
                            required: true,
                        },
                        {
                            id: 'operator',
                            title: strings.ResultTypes.CondtionOperatorValue,
                            type: CustomCollectionFieldType.dropdown,
                            defaultValue: ResultTypeOperator.Equal,
                            required: true,
                            options: [
                                {
                                    key: ResultTypeOperator.Equal,
                                    text: strings.ResultTypes.EqualOperator
                                },
                                {
                                    key: ResultTypeOperator.Contains,
                                    text: strings.ResultTypes.ContainsOperator
                                },
                                {
                                    key: ResultTypeOperator.StartsWith,
                                    text: strings.ResultTypes.StartsWithOperator
                                },
                                {

stylingFields.push(PropertyFieldCollectionData('customTemplateFieldValues', {
                    key: 'customTemplateFieldValues',
                    label: strings.customTemplateFieldsLabel,
                    panelHeader: strings.customTemplateFieldsPanelHeader,
                    manageBtnLabel: strings.customTemplateFieldsConfigureButtonLabel,
                    value: this.properties.customTemplateFieldValues,
                    fields: [
                        {
                            id: 'fieldName',
                            title: strings.customTemplateFieldTitleLabel,
                            type: CustomCollectionFieldType.string,
                        },
                        {
                            id: 'searchProperty',
                            title: strings.customTemplateFieldPropertyLabel,
                            type: CustomCollectionFieldType.dropdown,
                            options: searchPropertyOptions
                        }
                    ]
                }));
            }
        }

        return stylingFields;
    }