import type { ExprValue } from '../types/expr-value';
import { ExpressionDef } from '../types/expression-def';
import type { FieldName, FieldSpace } from '../types/field-space';
export declare class ExprUngroup extends ExpressionDef {
    readonly control: 'all' | 'exclude';
    readonly expr: ExpressionDef;
    readonly fields: FieldName[];
    legalChildTypes: import("../../../model/malloy_types").TypeDesc[];
    elementType: string;
    constructor(control: 'all' | 'exclude', expr: ExpressionDef, fields: FieldName[]);
    getExpression(fs: FieldSpace): ExprValue;
}