Help with hw 1: http://www.ccs.neu.edu/home/lieber/com1205/f02/hw/1/ Execute the Unix command fgrep "_trv(" *.java in the graph/gen subdirectory. We get: Label.java: void allLabels_Tree_trv(SummingVisitor __v0, UniversalVisitor __v1) { Label.java: void allLabels2_Tree_trv(SummingVisitor2 __v0, UniversalVisitor __v1) { Tree.java: allLabels_Tree_trv(__v0, __v1); Tree.java: void allLabels_Tree_trv(SummingVisitor __v0, UniversalVisitor __v1) { Tree.java: l.allLabels_Tree_trv(__v0, __v1); Tree.java: left.allLabels_Tree_trv(__v0, __v1); Tree.java: right.allLabels_Tree_trv(__v0, __v1); Tree.java: allLabels2_Tree_trv(__v0, __v1); Tree.java: void allLabels2_Tree_trv(SummingVisitor2 __v0, UniversalVisitor __v1) { Tree.java: l.allLabels2_Tree_trv(__v0, __v1); Tree.java: left.allLabels2_Tree_trv(__v0, __v1); Tree.java: right.allLabels2_Tree_trv(__v0, __v1); Tree.java: leftTrees_Tree_trv(__v0); Tree.java: void leftTrees_Tree_trv(UniversalVisitor __v0) { Tree.java: left.leftTrees_Tree_trv(__v0); Tree.java: allTrees_Tree_trv(__v0); Tree.java: void allTrees_Tree_trv(UniversalVisitor __v0) { Tree.java: left.allTrees_Tree_trv(__v0); Tree.java: right.allTrees_Tree_trv(__v0);