Method getTypeDescendants

src/graph/traversal.ts:463–486

(
    nodeId: string,
    nodes: Map<string, Node>,
    edges: Edge[],
    visited: Set<string>
  )

  }

  private getTypeDescendants(
    nodeId: string,
    nodes: Map<string, Node>,
    edges: Edge[],
    visited: Set<string>
  ): void {
    if (visited.has(nodeId)) {
      return;
    }
    visited.add(nodeId);

    const incomingEdges = this.queries.getIncomingEdges(nodeId, ['extends', 'implements']);
    if (incomingEdges.length === 0) return;
    const children = this.queries.getNodesByIds(incomingEdges.map((e) => e.source));

    for (const edge of incomingEdges) {
      const childNode = children.get(edge.source);
      if (childNode && !nodes.has(childNode.id)) {
        nodes.set(childNode.id, childNode);
        edges.push(edge);
        this.getTypeDescendants(childNode.id, nodes, edges, visited);
      }
    }
  }

  /**
   * Find all usages of a symbol