/// <summary>
///     Get all the <see cref="YamlNode" /> that match the provided yamlPath query.
///     For YamlPath documentation see 
///         https://github.com/wwkimball/yamlpath/wiki/Segments-of-a-YAML-Path 
///     Does not support Collectors.
/// </summary>
/// <param name="yamlNode">The YamlMappingNode to operate on</param>
/// <param name="yamlPath">The YamlPath query to use</param>
/// <returns>An <see cref="IEnumerable{YamlNode}" /> of the matching nodes</returns>
public static IEnumerable<YamlNode> Query(this YamlNode yamlNode, string yamlPath)

// The extension methods are in this namespace
using gfs.YamlDotNet.YamlPath;

// Your query goes here
string yourYamlPathQuery = "...";

// load yml
YamlStream yaml = new YamlStream();
yaml.Load(new StringReader(targetYamlString));

// get the node you want to query, for example the root node of the first document
YamlMappingNode mapping = (YamlMappingNode)yaml.Documents[0].RootNode;

// Receive an enumeration of nodes which match the YamlPath query
IEnumerable<YamlNode> matching = mapping.Query(yourYamlPathQuery);

using gfs.YamlDotNet.YamlPath;

string yourYamlPathQuery = "...";

List<string> queryProblems = YamlPathExtensions.GetQueryProblems(yourYamlPathQuery);