IoCContainer apply(IoCContainer other)

Combines all bindings from the other container with this one's, and returns a new instance that combines the bindings. The bindings in other takes precedence.

var a = new IoCContainer().bind(int, toValue: 1).bind(String, toValue: "x");
var b = new IoCContainer().bind(int, toValue: 2);
var c = a.apply(b);
c.resolve((int i, String s) {
  print(s); // x
  print(i); // 2
});

Source 

IoCContainer apply(IoCContainer other);