<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def skip_pickle_inject(app, what, name, obj, skip, options):
 """skip global wrapper._raw_slave names used only for pickle support"""

    if name.endswith('._raw_slave'):
        return True
    return None