import { ChangeDetectorRef, ElementRef, EventEmitter, OnInit, Renderer2 } from '@angular/core';
import { ControlValueAccessor, FormControl } from '@angular/forms';
import { GasCheckbox } from '../gas-checkbox.namespace';
import { GasForm } from '../../gas-form.namespace';
import { GasFormBaseComponent } from '../../gas-form-base-component';
export declare class GasCheckboxGroupComponent extends GasFormBaseComponent implements ControlValueAccessor, OnInit {
    changeDetectorRef: ChangeDetectorRef;
    elementRef: ElementRef;
    renderer: Renderer2;
    title: string;
    checkboxes: GasCheckbox.Checkbox[];
    expandable: string | boolean;
    visibleChanges: string | boolean;
    multi: string | boolean;
    clicked: EventEmitter<any>;
    expanded: boolean;
    form: FormControl;
    checkboxControls: {
        key: string;
        control: FormControl;
    }[];
    constructor(changeDetectorRef: ChangeDetectorRef, elementRef: ElementRef, renderer: Renderer2);
    ngOnInit(): void;
    getExpanded(): boolean;
    toggleCheckbox(key: string): void;
    getCheckboxValue(key: string): boolean;
    getCheckboxState(item: GasCheckbox.Checkbox): GasForm.InputState;
    getCheckboxModify(item: GasCheckbox.Checkbox): boolean;
    toggleExpand(): void;
}