import { ElementRef } from '@angular/core';
import { MdcRipple } from '@angular-mdc/web/ripple';
import { MdcHelperText } from './helper-text';
export declare abstract class MdcFormFieldControl<T> {
    /** The value of the control. */
    value?: T | null;
    /** The element ID for this control. */
    readonly id: string;
    /** The element ID for this control's hidden input. */
    readonly inputId?: string;
    readonly elementRef: ElementRef;
    readonly ripple?: MdcRipple;
    readonly controlType?: string;
    helperText?: MdcHelperText | null;
}