Macro item 

macro_rules! item {
    ( bar_fill ) => { ... };
    (  eta                  ) => { ... };
    (( eta $format:literal )) => { ... };
    (( eta $format:literal $none:literal )) => { ... };
    ( eta_hms ) => { ... };
    ( message_fill ) => { ... };
    (  percent                  ) => { ... };
    (( percent $format:literal )) => { ... };
    (( percent $format:literal $none:literal )) => { ... };
    ( pos       ) => { ... };
    ( pos_group ) => { ... };
    (( pos $format:literal )) => { ... };
    ( pos_bin ) => { ... };
    (( pos_bin $format:literal )) => { ... };
    ( pos_dec ) => { ... };
    (( pos_dec $format:literal )) => { ... };
    (  speed                  ) => { ... };
    (( speed $format:literal )) => { ... };
    (( speed $format:literal $none:literal )) => { ... };
    (  speed_int                  ) => { ... };
    (  speed_group                ) => { ... };
    (( speed_int $format:literal )) => { ... };
    (( speed_int $format:literal $none:literal )) => { ... };
    (  speed_bin                  ) => { ... };
    (( speed_bin $format:literal )) => { ... };
    (( speed_bin $format:literal $none:literal )) => { ... };
    (  speed_dec                  ) => { ... };
    (( speed_dec $format:literal )) => { ... };
    (( speed_dec $format:literal $none:literal )) => { ... };
    (  total                  ) => { ... };
    (  total_group            ) => { ... };
    (( total $format:literal )) => { ... };
    (( total $format:literal $none:literal )) => { ... };
    (  total_bin                  ) => { ... };
    (( total_bin $format:literal )) => { ... };
    (( total_bin $format:literal $none:literal )) => { ... };
    (  total_dec                  ) => { ... };
    (( total_dec $format:literal )) => { ... };
    (( total_dec $format:literal $none:literal )) => { ... };
    (( $expr:expr )) => { ... };
    ( $literal:literal ) => { ... };
}

Internal Creates one Item.

This is used internally by [items] macro.