def process_defs(exp, parent)
      inside_new_context(Context::SingletonMethodContext, exp, parent) do
        increase_statement_count_by(exp.body)
        process(exp)
      end
    end
def process_defs(exp, parent)
      inside_new_context(Context::SingletonMethodContext, exp, parent) do
        increase_statement_count_by(exp.body)
        process(exp)
      end
    end
Handles `defs` nodes ("define singleton").

 An input example that would trigger this method would be:

   def self.call_me; foo = 2; bar = 5; end

 Given the above example we would count 2 statements overall.