added cached access on target stage

.settings/org.moreunit.prefs

...ant/methodcallWithPorts/framework/core/AbstractStage.java

...variant/methodcallWithPorts/framework/core/InputPort.java

...ariant/methodcallWithPorts/framework/core/OutputPort.java

.../variant/methodcallWithPorts/framework/core/Pipeline.java

...thPorts/framework/core/pipe/OrderedGrowableArrayPipe.java

...allWithPorts/framework/core/pipe/OrderedGrowablePipe.java

...variant/methodcallWithPorts/framework/core/pipe/Pipe.java

...dcallWithPorts/framework/core/pipe/SingleElementPipe.java

...ant/methodcallWithPorts/framework/core/pipe/SpScPipe.java

...lWithPorts/framework/core/pipe/UnorderedGrowablePipe.java

...time/variant/methodcallWithPorts/stage/CollectorSink.java

...examples/experiment15/MethodCallThroughputAnalysis15.java