import type { ExtractUnit } from '../../../model/malloy_types';
import type { ExprValue } from '../types/expr-value';
import { ExpressionDef } from '../types/expression-def';
import type { FieldSpace } from '../types/field-space';
export declare class ExprTimeExtract extends ExpressionDef {
    readonly extractText: string;
    readonly args: ExpressionDef[];
    elementType: string;
    static pluralMap: Record<string, ExtractUnit>;
    static extractor(funcName: string): ExtractUnit | undefined;
    constructor(extractText: string, args: ExpressionDef[]);
    getExpression(fs: FieldSpace): ExprValue;
}