question: private static boolean isOperatorVariableAccess ( final INaviOperandTreeNode node ) { final List < INaviOperandTreeNode > children = node . getChildren ( ) ; if ( children . size ( ) == 2 ) { final INaviOperandTreeNode child0 = children . get ( 0 ) ; final INaviOperandTreeNode child1 = children . get ( 1 ) ; return isVariable ( child0 ) ^ isVariable ( child1 ) ; } else { return false ; } }
target:  Determines whether a given node is a variable access node that can be simplified.