java.util.IdentityHashMap

is imported to:

.   bluej.collect
.   bluej.editor.stride
.   bluej.pkgmgr
.   bluej.stride.framedjava.ast
.   bluej.stride.framedjava.elements
.   bluej.stride.framedjava.frames
.   bluej.stride.generic
.   bluej.utility.javafx
.   bluej.utility.javafx.binding