When patching a compiler generated method from a nested class, how do I declare the __instance property?

[SamuelBucher]

I'm using Harmony for my RimWorld mod, and I want to patch a method called DrawExtraEyeGraphic() within PawnRenderer. Unfortunately, that method is actually a local method of DrawHeadHair(), which makes things a lot more complicated. According to dNSpy, after compilation, this translates into DrawExtraEyeGraphic() being contained within a weirdly named class <>c__DisplayClass54_0 within PawnRenderer. I know how to access and patch DrawExtraEyeGraphic():

[HarmonyPatch]
        class DrawExtraEyeGraphicPatch
        {
            public static MethodBase TargetMethod()
            {
                var type = AccessTools.FirstInner(typeof(PawnRenderer), t => t.Name.Contains("c__DisplayClass54_0"));
                return AccessTools.FirstMethod(type, method => method.Name.Contains("g__DrawExtraEyeGraphic"));
            }

            [HarmonyPrefix]
            public static bool DrawExtraEyeGraphicPrefix()
            {
                return false;
            }
        }

With this code, I successfully prevented the DrawExtraEyeGraphic() method from running. However, I actually want to replace it with a slightly modified version of itself. To do this, I need access to the fields of the compiler generated class I'm patching through __instance. Despite my searching, I couldn't find any info on how to do that. I can't just put the class's name into my code since it doesn't abide syntax. Any help?

[pardeike]

You use object as type and then different ways to access fields on in like FieldRef or simple reflections.

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