src/com/google/javascript/jscomp/NodeUtil.java
/** Create a node for an empty result expression: "void 0" */
Create a node for an empty result expression: "void 0"
Create a node for an empty result expression : " void 0 "
public static Node newUndefinedNode(Node srcReferenceNode) {
    Node node = IR.voidNode(IR.number(0));
    if (srcReferenceNode != null) {
      node.useSourceInfoFromForTree(srcReferenceNode);
    }
    return node;
  }
public static Node newUndefinedNode ( Node srcReferenceNode ) { Node node = IR . voidNode ( IR . number ( 0 ) ) ; if ( srcReferenceNode != null ) { node . useSourceInfoFromForTree ( srcReferenceNode ) ; } return node ; }
Create a node for an empty result expression: "void 0"
Create a node for an empty result expression : " void 0 "