package Ġit . uni bo . al che mist . model . implement ations . groups Ċ Ċ import Ġit . uni bo . al che mist . model . interfaces . Group Ċ import Ġit . uni bo . al che mist . model . interfaces . Pe de stri an Ċ Ċ /** Ċ Ġ* ĠGroup Ġrepresenting Ġa Ġpe de stri an Ġalone . Ċ Ġ*/ Ċ class ĠAl one < T >( pe de stri an : ĠPe de stri an < T >) Ġ: ĠGroup < T , ĠPe de stri an < T >> Ġ{ ĊĊĠĠĠ Ġoverride Ġval Ġmembers Ġ= ĠlistOf ( pe de stri an ) ĊĊĠĠĠ Ġoverride Ġfun Ġadd Member ( node : ĠPe de stri an < T >): ĠGroup < T , ĠPe de stri an < T >> Ġ= Ġthrow ĠUnsupportedOperationException () ĊĊĠĠĠ Ġoverride Ġfun Ġremove Member ( node : ĠPe de stri an < T >): ĠGroup < T , ĠPe de stri an < T >> Ġ= Ġthrow ĠUnsupportedOperationException () Ċ } Ċ