building of exporters of functions in DependencyFinder now being done
only once -   thats the main change.
It is  done through the indirect dependency finding process and not
initially at the time of extract merging.
 For types, it has to be done both the times as we need to know
beforehand so as to enable the indirect dependency analysis  ,  which
plugins are exporting which types. The satisfyingPluginSets attribute
not being used in ImpExp anymore.
javadoc
.