How do I trigger one block of code whenever any of a set of SignalProducers change? In other words, how do I get rid of my current redundant code:
property1.producer.startWithValues { (value) in
// do stuff with property1.value and property2.value
}
property2.producer.startWithValues { (value) in
// do the same stuff with property1.value and property2.value
}