core/src/com/google/inject/internal/DeferredLookups.java
void initialize(Errors errors) {
    injector.lookups = injector;
    new LookupProcessor(errors).process(injector, lookups);
  }
void initialize(Errors errors) {
    injector.lookups = injector;
    new LookupProcessor(errors).process(injector, lookups);
  }
Initialize the specified lookups, either immediately or when the injector is created.