import type { dh } from '@deephaven/jsapi-types';
/**
 * Descriptor for a variable by name. Used when needed to fetch an object.
 */
export type NameVariableDescriptor = {
    /** Type of the variable */
    type: string;
    /** Name of the variable */
    name: string;
};
/**
 * Descriptor for a variable by id. Used when needed to fetch an object.
 */
export type IdVariableDescriptor = {
    /** Type of the variable */
    type: string;
    /** Id of the variable */
    id: string;
};
export type UriVariableDescriptor = string;
export declare function isNameVariableDescriptor(value: unknown): value is NameVariableDescriptor;
export declare function isIdVariableDescriptor(value: unknown): value is IdVariableDescriptor;
export declare function isVariableDescriptor(value: unknown): value is dh.ide.VariableDescriptor;
/**
 * Function to fetch an object based on a provided descriptor object.
 * @param descriptor Descriptor object or URI to fetch the object from. Can be extended by a specific implementation to
 *                   include additional fields (such as a session ID) to uniquely identify an object.
 */
export type ObjectFetcher = <T = unknown>(descriptor: dh.ide.VariableDescriptor | UriVariableDescriptor) => Promise<T>;
export declare const ObjectFetcherContext: import("react").Context<ObjectFetcher | null>;
/**
 * Gets a descriptor that only has the ID or name set, but not both.
 * API will throw an error if both are set when fetching from the connection.
 * @param descriptor Variable descriptor to sanitize
 * @returns Descriptor object that has either the ID or name set, but not both.
 */
export declare function sanitizeVariableDescriptor(descriptor: Partial<dh.ide.VariableDescriptor>): NameVariableDescriptor | IdVariableDescriptor;
/**
 * Get the variable descriptor for a definition.
 * @param definition Definition to get the variable descriptor from
 * @returns Serializable VariableDescriptor object
 */
export declare function getVariableDescriptor(definition: dh.ide.VariableDescriptor & {
    title?: string;
}): dh.ide.VariableDescriptor;
/**
 * Use a function to fetch an object based on provided metadata
 * @returns Function to asynchronously fetch an object based on provided metadata
 */
export declare function useObjectFetcher(): ObjectFetcher;
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