def get_env_body(self, builder, envptr):
        """
        From the given *envptr* (a pointer to a _dynfunc.Environment object),
        get a EnvBody allowing structured access to environment fields.
        """
        body_ptr = cgutils.pointer_add(
            builder, envptr, _dynfunc._impl_info['offsetof_env_body'])
        return EnvBody(self, builder, ref=body_ptr, cast_ref=True)

        From the given *envptr* (a pointer to a _dynfunc.Environment object),
        get a EnvBody allowing structured access to environment fields.
        
numba/core/cpu.py