javafx.scene.layout.GridPane

is imported to:

.   bluej.debugmgr
.   bluej.editor.moe
.   bluej.groupwork.ui
.   bluej.pkgmgr
.   bluej.prefmgr
.   bluej.stride.framedjava.frames
.   greenfoot.guifx
.   greenfoot.guifx.export
.   greenfoot.guifx.images