def METHOD_NAME(stub):
    if stub in force_used: return True
    if stub in force_unused: return False
    # quick check in src, module and platform dirs
    # this one will not filter out comments or strings, so there are false negatives
    r = os.system("grep -nr --include *.h --include *.c '[^a-zA-Z_\"]%s[^a-zA-Z0-9_\"]' %s %s %s" % (stub, os.path.join(top_dir, "src"), os.path.join(top_dir, "modules"), os.path.join(top_dir, "platform")))
    return r == 0