with_instrumenter

# File activerecord/lib/active_record/connection_adapters/abstract_adapter.rb, line 198
      def with_instrumenter(instrumenter, &block) # :nodoc:
        Thread.handle_interrupt(EXCEPTION_NEVER) do
          previous_instrumenter = @instrumenter
          @instrumenter = instrumenter
          Thread.handle_interrupt(EXCEPTION_IMMEDIATE, &block)
        ensure
          @instrumenter = previous_instrumenter
        end
      end