class EtcGroupView

object that hold a specifc view on etc group

def entries

returns the group object 
def entries
  @filter
end

def gids

only return gids 
def gids
  @parent.gids(@filter)
end

def groups

only returns group name 
def groups
  @parent.groups(@filter)
end

def initialize(parent, filter) 

def initialize(parent, filter)
  @parent = parent
  @filter = filter
end

def users

only returns users 
def users
  @parent.users(@filter)
end