Got at least one data fetching method working; turns out, we can't use a patched LogicStack to get the data

Vendor/Swan.Lite-3.1.0/Parsers/ArgumentOptionAttribute.cs

@@ -0,0 +1,101 @@
+using System;
+
+namespace Swan.Parsers
+{
+    /// <summary>
+    /// Models an option specification.
+    /// Based on CommandLine (Copyright 2005-2015 Giacomo Stelluti Scala and Contributors.).
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Property)]
+    public sealed class ArgumentOptionAttribute
+        : Attribute
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ArgumentOptionAttribute"/> class.
+        /// </summary>
+        /// <param name="longName">The long name of the option.</param>
+        public ArgumentOptionAttribute(string longName)
+            : this(string.Empty, longName)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ArgumentOptionAttribute"/> class.
+        /// </summary>
+        /// <param name="shortName">The short name of the option.</param>
+        /// <param name="longName">The long name of the option or null if not used.</param>
+        public ArgumentOptionAttribute(char shortName, string longName)
+            : this(new string(shortName, 1), longName)
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ArgumentOptionAttribute"/> class.
+        /// </summary>
+        /// <param name="shortName">The short name of the option..</param>
+        public ArgumentOptionAttribute(char shortName)
+            : this(new string(shortName, 1), string.Empty)
+        {
+        }
+
+        private ArgumentOptionAttribute(string shortName, string longName)
+        {
+            ShortName = shortName ?? throw new ArgumentNullException(nameof(shortName));
+            LongName = longName ?? throw new ArgumentNullException(nameof(longName));
+        }
+
+        /// <summary>
+        /// Gets long name of this command line option. This name is usually a single English word.
+        /// </summary>
+        /// <value>
+        /// The long name.
+        /// </value>
+        public string LongName { get; }
+
+        /// <summary>
+        /// Gets a short name of this command line option, made of one character.
+        /// </summary>
+        /// <value>
+        /// The short name.
+        /// </value>
+        public string ShortName { get; }
+
+        /// <summary>
+        /// When applying attribute to <see cref="System.Collections.Generic.IEnumerable{T}"/> target properties,
+        /// it allows you to split an argument and consume its content as a sequence.
+        /// </summary>
+        public char Separator { get; set; } = '\0';
+
+        /// <summary>
+        /// Gets or sets mapped property default value.
+        /// </summary>
+        /// <value>
+        /// The default value.
+        /// </value>
+        public object? DefaultValue { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether a command line option is required.
+        /// </summary>
+        /// <value>
+        ///   <c>true</c> if required; otherwise, <c>false</c>.
+        /// </value>
+        public bool Required { get; set; }
+
+        /// <summary>
+        /// Gets or sets a short description of this command line option. Usually a sentence summary.
+        /// </summary>
+        /// <value>
+        /// The help text.
+        /// </value>
+        public string? HelpText { get; set; }
+
+        /// <summary>
+        /// Gets or sets the default argument.
+        /// </summary>
+        /// <value>
+        /// The default argument.
+        /// </value>
+        public bool IsDefault { get; set; }
+    }
+}