<s> import grow <EOL> from protorpc import messages <EOL> class CustomPreprocessor ( grow . Preprocessor ) : <EOL> KIND = '<STR_LIT>' <EOL> class Config ( messages . Message ) : <EOL> value = messages . StringField ( <NUM_LIT:1> ) <EOL> def run ( self , ** kwargs ) : <EOL> self . pod . _custom_preprocessor_value = self . config . value </s>
