import { SchemaNode } from '../schema-node';
export declare abstract class SchemaStrategy {
    keywords: Set<string>;
    nodeClass: SchemaNode;
    extraKeywords: any;
    type: string;
    constructor(schemaNode: any);
    matchObject(_object: any): void;
    matchSchema(_schema: Record<string, unknown>): void;
    addObject(_object: any): void;
    addSchema(schema: Record<string, unknown>): void;
    toSchema(): any;
    private addExtraKeywords;
}