in client/src/yaml-support/yaml-locator.ts [77:83]
public getMatchedElement(textDocument: vscode.TextDocument, pos: vscode.Position): YamlMatchedElement {
const key: string = textDocument.uri.toString();
this.ensureCache(key, textDocument);
const cacheEntry = this.cache[key];
// findNodeAtPosition will find the matched node at given position
return findNodeAtPosition(cacheEntry.yamlDocs, cacheEntry.lineLengths, pos.line, pos.character);
}