question: returns true if this node is the head of its dominatortree . concode_field_sep DominatorNode parent concode_elem_sep List children concode_elem_sep Object gode concode_field_sep Object getGode concode_elem_sep List getChildren concode_elem_sep DominatorNode getParent concode_elem_sep boolean isTail concode_elem_sep String toString concode_elem_sep void setParent concode_elem_sep boolean addChild
target: boolean function ( ) { if ( parent == null ) return true ; else return false ; }