Macro task_state 

macro_rules! task_state {
    ($task_state:ident $(, url = $url:expr)? $(, scratchpad = $scratchpad:expr)? $(, common_args: $common_args:expr)? $(, context = $context:expr)? $(, job_context = $job_context:expr)? $(, params = $params:expr)? $(, commons = $commons:expr)?) => { ... };
}

Helper macro to make docs briefer.