class ActiveFedora::LdpResource

def self.graph_class 

def self.graph_class
  ActiveTriples::Resource
end

def build_empty_graph 

def build_empty_graph
  graph_class.new(subject_uri)
end

def graph_class 

def graph_class
  self.class.graph_class
end

def marshal_dump

Don't dump @client, it has a proc and thus can't be serialized. 
def marshal_dump
  (instance_variables - [:@client]).map { |name| [name, instance_variable_get(name)] }
end

def marshal_load(data) 

def marshal_load(data)
  ivars = data
  ivars.each { |name, val| instance_variable_set(name, val) }
end