/// <summary>
/// Returns a node as an <see cref="long"/>.
/// </summary>
/// <param name="path">A Json+ query path that identifies a node in the current context.</param>
/// <param name="defaultValue">The default value to return if the node specified by <paramref name="path"/> does not exist. Defaults to zero.</param>
/// <returns>The <see cref="Int64"/> value of the node specified by <paramref name="path"/>, or <paramref name="defaultValue"/> if the node does not exist.</returns>
public long GetInt64(JsonPlusPath path, long defaultValue = 0)
{
JsonPlusValue value = GetNode(path);
if (ReferenceEquals(value, JsonPlusValue.Undefined))
{
return(defaultValue);
}
return(value.GetInt64());
}