$chain<$R2, $Out2> abstract method

RequestDateCopyWith<$R2, $In, $Out2> $chain<$R2, $Out2>(
  1. Then<$Out2, $R2> t
)

Implementation

RequestDateCopyWith<$R2, $In, $Out2> $chain<$R2, $Out2>(Then<$Out2, $R2> t);