package Ġcom . interaction fields . signal ing . ot Ċ Ċ import Ġjava . util . concurrent . Copy On Write ArrayList Ċ Ċ data Ġclass ĠDocument ( ĊĠĠĠ Ġvar Ġcontent : ĠString , ĊĠĠĠ Ġvar Ġoperations : ĠCopy On Write ArrayList < Text Operation > Ċ ) Ċ