import type { DataTypeRootType, EntityRootType, EntityTypeRootType, PropertyTypeRootType, Subgraph, SubgraphRootType } from "../../types/subgraph.js";
/**
 * Returns all root elements.
 *
 * For a narrower return type, first narrow the type of `subgraph` by using one of the helper type-guards:
 * - {@link isDataTypeRootedSubgraph}
 * - {@link isPropertyTypeRootedSubgraph}
 * - {@link isEntityTypeRootedSubgraph}
 * - {@link isEntityRootedSubgraph}
 *
 * @param subgraph
 */
export declare const getRoots: <RootType extends SubgraphRootType>(subgraph: Subgraph<RootType>) => RootType["element"][];
/**
 * A type-guard that can be used to constrain the generic parameter of `Subgraph` to `DataTypeWithMetadata`.
 *
 * Doing so will help TS infer that `getRoots` returns `DataTypeWithMetadata`s, removing the need for additional
 * type checks or casts.
 *
 * @param subgraph
 */
export declare const isDataTypeRootedSubgraph: (subgraph: Subgraph) => subgraph is Subgraph<DataTypeRootType>;
/**
 * A type-guard that can be used to constrain the generic parameter of `Subgraph` to `PropertyTypeWithMetadata`.
 *
 * Doing so will help TS infer that `getRoots` returns `PropertyTypeWithMetadata`s, removing the need for additional
 * type checks or casts.
 *
 * @param subgraph
 */
export declare const isPropertyTypeRootedSubgraph: (subgraph: Subgraph) => subgraph is Subgraph<PropertyTypeRootType>;
/**
 * A type-guard that can be used to constrain the generic parameter of `Subgraph` to `EntityTypeWithMetadata`.
 *
 * Doing so will help TS infer that `getRoots` returns `EntityTypeWithMetadata`s, removing the need for additional
 * type checks or casts.
 *
 * @param subgraph
 */
export declare const isEntityTypeRootedSubgraph: (subgraph: Subgraph) => subgraph is Subgraph<EntityTypeRootType>;
/**
 * A type-guard that can be used to constrain the generic parameter of `Subgraph` to `Entity`.
 *
 * Doing so will help TS infer that `getRoots` returns `Entity`s, removing the need for additional
 * type checks or casts.
 *
 * @param subgraph
 */
export declare const isEntityRootedSubgraph: (subgraph: Subgraph) => subgraph is Subgraph<EntityRootType>;