question: private void childInv ( Node r ) { Edge e ; Node s ; for ( int noa = 0 ; ( e = r . getChild ( noa ) ) != null ; noa ++ ) { s = e . getTarget ( ) ; s . setVisible ( false ) ; childInv ( s ) ; } }
target:  Recursively goes through the tree and sets all the children to invisible, Not the parent though.