import { PreApplyValidator } from '../interfaces/pre-apply-validator.interface';
/**
 * A Filter modifier is a component via which the user can modify the filter params
 * thus effecting the filter results.
 */
export declare abstract class FilterModifier<T, InnerSelection> {
    /**
     * Current errors.
     */
    errorMessages: Array<string>;
    /**
     * Current warnings.
     */
    warningMessages: Array<string>;
    /**
     * Holds the error validation logic that comes from outside the costimize-ui-lib
     * via the modifiers control options.
     *
     * {@link PreApplyValidator}
     */
    validator: PreApplyValidator<T>;
    /**
     * Called with specific filter selections when the user wants to apply an already saved filter.
     *
     * @param selection
     */
    abstract onSavedGcpFilterApplied(selection: InnerSelection): void;
    /**
     * Validates if the modifier selection is valid.
     *
     * @param selection {@link GcpFilterSelections}
     * @returns true if the selection is valid, false otherwise
     */
    isValid(selection: T): boolean;
}