import { ColumnDefinition } from 'verben-ng-ui';
import { SearchPropertyValueType } from '../models/api-payload';
/**
 * Extract property name from column definition.
 * Only columns with accessorKey can be used for filter/sort — a column defined
 * with accessorFn alone (e.g. the actors "tags" column) has no server-side
 * property to filter or sort on.
 */
export declare function getPropertyName<T>(column: ColumnDefinition<T>): string;
/**
 * Infer API property type from column definition.
 * Uses basic heuristics based on the accessor key name.
 */
export declare function inferPropertyType<T>(column: ColumnDefinition<T>): SearchPropertyValueType;
/**
 * Find a column by its id.
 */
export declare function findColumn<T>(columns: ColumnDefinition<T>[], columnId: string): ColumnDefinition<T> | undefined;
/**
 * Columns that can take part in filter/sort — i.e. those backed by a real
 * property on the entity. Use this to feed the filter and sort builders so a
 * display-only column never produces a payload the API cannot honour.
 */
export declare function filterableColumns<T>(columns: ColumnDefinition<T>[]): ColumnDefinition<T>[];