export declare class AggHistogram { 'field': string; 'interval': number; 'offset'?: number; 'keyed'?: boolean; static readonly discriminator: string | undefined; static readonly mapping: { [index: string]: string; } | undefined; static readonly attributeTypeMap: Array<{ name: string; baseName: string; type: string; format: string; }>; static getAttributeTypeMap(): { name: string; baseName: string; type: string; format: string; }[]; constructor(); }