Is it possible to use a nested group without automatically prefixing?

[onlywei]

I want to do this:

@environ.config
class MyGroup:
  my_special_value1 = environ.var()
  my_special_value2 = environ.var()

@environ.config(prefix="")
class AppSettings:
  group = environ.group(MyGroup)

But I want my environment variables to be:

MY_SPECIAL_VALUE1=55
MY_SPECIAL_VALUE2=88

I don't want:

GROUP_MY_SPECIAL_VALUE1=55
GROUP_MY_SPECIAL_VALUE2=88

Is there an option I can pass to the environ.group() function to achieve this?