import { TemplateRef } from '@angular/core';
export declare class InputGroup {
    containerClass: boolean;
    /**
     * Set to `true` for an invalid input group component.
     */
    invalid: boolean;
    /**
     * Sets the text inside the `label` tag.
     */
    label: string | TemplateRef<any>;
    /**
     * Sets the optional helper text.
     */
    helperText: string | TemplateRef<any>;
    /**
     * Sets the invalid text.
     */
    invalidText: string | TemplateRef<any>;
    /**
     * Set to `true` for a condesned input group component;
     */
    condensed: boolean;
    isTemplate(value: any): boolean;
}