Add instructions to methodbodies

[erherhh4herh]

Could you please add a feature to add instructions to methodbodies? Thanks :)

[ioncodes]

I'm currently working on a full rewrite, so don't expect this to be added in this version.

[ioncodes]

Letting you know that this has been implemented in the v1 branch: f80a4c7#diff-803cb301f9ea1187fc6cba11a6814aaeR39