Get information about the index of a method in the containing type

[daveMueller]

Hi,
I'm curious if it is possible to get the index of a method in the containing type with cecil? The roslyn team is sometimes using this value to create names for generated synthesized methods. When I look into the documentation of the file
https://github.com/dotnet/roslyn/blob/main/src/Compilers/Core/Portable/CodeGen/DebugId.cs
it says something about 'the ordinal is included in the custom debug information record attached to the method'. But when I try this with cecil I only get some BinaryCustomDebugInformation that seem impossible to interpret.