Function ethcore::engines::default_system_or_code_call

pub fn default_system_or_code_call<'a>(
    machine: &'a EthereumMachine, 
    block: &'a mut ExecutedBlock
) -> impl FnMut(SystemOrCodeCallKind, Vec<u8>) -> Result<Vec<u8>, String> + 'a

Default SystemOrCodeCall implementation.