Allows hinting the component's constructor arguments of aggregated types. Both Java
arrays and java.util.Collection objects are supported. The elements of the sequence are
org.picocontainer.Parameter objects - they may resolve to constants,
component references, or nested sequences.
A planned change: It's relatively easy to modify Pico in such a way that it wouldn't be necessary to explicitly state the expected type of the sequence. This information can be extracted from the constructor.