Function mrb_prepend_module 

pub unsafe extern "C" fn mrb_prepend_module(
    mrb: *mut mrb_state,
    cla: *mut RClass,
    prepended: *mut RClass,
)

Prepends a module in another class or module.

Equivalent to: module B prepend A end @param mrb The current mruby state. @param cla A reference to module or a class. @param prepended A reference to the module to be prepended.