import { ElementRef } from '@angular/core';
import * as i0 from "@angular/core";
import * as i1 from "../../common/sapphire-view-encapsulation";
export declare class TextFieldPrefixDirective {
    private _elementRef;
    isTextNode(): boolean;
    constructor(_elementRef: ElementRef<HTMLElement>);
    static ɵfac: i0.ɵɵFactoryDeclaration<TextFieldPrefixDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<TextFieldPrefixDirective, "sp-text-field-prefix", never, {}, {}, never, never, false, [{ directive: typeof i1.UseComponentStyles; inputs: {}; outputs: {}; }]>;
}