export type GraphAttributes = Record<string, unknown>;
export interface KnowledgeGraphOptions {
    directed?: boolean;
}
export declare class KnowledgeGraph {
    readonly graph: GraphAttributes;
    readonly directed: boolean;
    private readonly nodeMap;
    private readonly edgeMap;
    private readonly successorMap;
    private readonly predecessorMap;
    constructor(options?: KnowledgeGraphOptions | boolean);
    private edgeKey;
    addNode(id: string, attributes: GraphAttributes): void;
    addEdge(source: string, target: string, attributes: GraphAttributes): void;
    isDirected(): boolean;
    hasNode(id: string): boolean;
    numberOfNodes(): number;
    numberOfEdges(): number;
    hasEdge(source: string, target: string): boolean;
    nodeIds(): string[];
    nodeEntries(): Array<[string, GraphAttributes]>;
    edgeEntries(): Array<[string, string, GraphAttributes]>;
    neighbors(id: string): string[];
    successors(id: string): string[];
    predecessors(id: string): string[];
    incidentNeighbors(id: string, limit?: number): string[];
    degree(id: string): number;
    nodeAttributes(id: string): GraphAttributes;
    edgeAttributes(source: string, target: string): GraphAttributes;
}