import type { Argument, InvokedStructRef, SourceDef, StructRef } from '../../../model/malloy_types';
import { Source } from '../source-elements/source';
import type { ParameterSpace } from '../field-space/parameter-space';
export declare class QueryHeadStruct extends Source {
    readonly fromRef: StructRef;
    readonly sourceArguments: Record<string, Argument> | undefined;
    elementType: string;
    constructor(fromRef: StructRef, sourceArguments: Record<string, Argument> | undefined);
    structRef(): InvokedStructRef;
    getSourceDef(parameterSpace: ParameterSpace | undefined): SourceDef;
}