class RuboCop::Cop::Style::SelfAssignment

def check_send_node(node, rhs, var_name, var_type)
  receiver, method_name, *_args = *rhs
  return unless OPS.include?(method_name)
  target_node = s(var_type, var_name)
  return unless receiver == target_node
  add_offense(node, message: format(MSG, method: method_name))
end