import { CircularRefStrategy } from './references';
import { SchemaRegistry } from './registry';
export interface TransformationOptions {
    registry?: SchemaRegistry;
    circularRefStrategy?: CircularRefStrategy;
    skipUndefinedProperties?: boolean;
}
export declare class Transformer {
    readonly options: TransformationOptions;
    private referenceGraph;
    constructor(options: TransformationOptions);
    toPlain(typed: any, sourceType?: any, existingTarget?: any): any;
    private applyFieldToPlain;
    toTyped(plain: any, targetType: any, existingTarget?: any): any;
    private applyFieldToTyped;
    private postProcessObject;
    private getFields;
    private getSchema;
    /**
     * Get the (empty) object to put the source values on.
     * @param value The source value
     * @param targetType The optional type of the target
     * @param existingTarget An object that should be used as target
     */
    private getTargetObject;
}