in tools/src/cycleCheck.ts [35:45]
function buildRefGraph(schema: object) {
const root = new SchemaRefNode();
findRefs(schema, root);
for (const schemaRef of Object.keys(root.children)) {
const childNode = root.children[schemaRef];
const childSchema = findByRef(schema, schemaRef);
findRefs(childSchema, childNode);
}
return root;
}