package Ġcom . ag abo ard i . par ch int as ca . main Ċ Ċ import Ġcom . cla udi ode gio . ms v . model . Filter Ċ Ċ interface ĠFilter Interface Ġ{ ĊĠĠĠ Ġfun Ġon Filter Added ( filter : ĠFilter ) ĊĠĠĠ Ġfun Ġon Filter Changed ( filters : ĠMutable List < Filter >) ĊĠĠĠ Ġfun Ġon Filter Removed ( filter : ĠFilter ) Ċ }