import { Observable } from 'rxjs';
import { NgControl } from '@angular/forms';
/** An interface which allows a control to work inside of a `InputContainer`. */
export declare abstract class InputContainerService<T> {
    /** The value of the control. */
    value: T | null;
    /**
     * Stream that emits whenever the state of the control changes such that the parent `MatFormField`
     * needs to run change detection.
     */
    readonly stateChanges: Observable<void>;
    /** The element ID for this control. */
    readonly id: string;
    /** The placeholder for this control. */
    readonly placeholder: string;
    /** Gets the NgControl for this control. */
    readonly ngControl: NgControl | null;
    /** Whether the input is autofilled. */
    readonly focused: boolean;
    /**
     * Whether the input is currently in an autofilled state. If property is not present on the
     * control it is assumed to be false.
     */
    readonly autofilled: boolean;
    /** Whether the control is in an error state. */
    readonly errorState: boolean;
    /** Whether the control is empty. */
    readonly empty: boolean;
    /** Whether the control is required. */
    readonly required: boolean;
    /** Whether the control is readonly. */
    readonly readonly: boolean;
    /** Whether the control is disabled. */
    readonly disabled: boolean;
    /** Sets the type of message to style the input. */
    readonly status: string;
    /** Sets the list of element IDs that currently describe this control. */
    abstract setDescribedByIds(ids: string[]): void;
}