/**
 * Retrieves all related compositions from local storage by relation name.
 *
 * **Process Flow (Complex Logic)**:
 * 1. Converts relation string to type concept (e.g., "the_email" → type concept)
 * 2. Finds all connections from source concept with that relation type
 * 3. For each connection, retrieves the target composition
 * 4. Returns array of all related compositions
 *
 * @param id - The source concept ID to get relations from
 * @param relation - The relation name (e.g., "the_email", "the_address")
 * @param userId - User ID for permissions
 * @returns Array of composition objects representing related entities
 * @throws Error if relation lookup or composition retrieval fails
 *
 * @example
 * // Get all email addresses related to a person
 * const emails = await GetRelationLocal(personId, "the_email", userId);
 * // Returns: [emailComposition1, emailComposition2, ...]
 */
export declare function GetRelationLocal(id: number, relation: string, userId: number): Promise<any>;