import { ChangeDetectorRef, ElementRef, QueryList } from "@angular/core";
import { ControlContainer } from "@angular/forms";
import { SpsAbstractFieldsetComponent } from "../forms/sps-abstract-fieldset.abstract.component";
import { SpsFormControlComponent } from "../forms/sps-form-control.abstract.component";
export declare class SpsInputGroupComponent extends SpsAbstractFieldsetComponent {
    stacked: boolean;
    children: QueryList<SpsFormControlComponent<any>>;
    readonly spsFormGroupClass = true;
    readonly isFocused: boolean;
    readonly isInErrorState: boolean;
    readonly isRequired: boolean;
    constructor(changeDetector: ChangeDetectorRef, ctrlContainer: ControlContainer, elementRef: ElementRef);
}