class Appsignal::Transaction::NilTransaction

current transaction.
transaction, so that it’s still safe to call methods on it if there is no
Stub that is returned by {Transaction.current} if there is no current

def instrument(*_args)

Instrument should still yield 
def instrument(*_args)
  yield
end

def method_missing(m, *args, &block) 

def method_missing(m, *args, &block)
end

def nil_transaction? 

def nil_transaction?
  true
end