tinymce.html.js
function() {
                var node, next, self = this;
                for (node = self.firstChild; node;) {
                    next = node.next;
                    self.insert(node, self, true);
                    node = next;
                }
                self.remove();
            }
function() {
                var node, next, self = this;
                for (node = self.firstChild; node;) {
                    next = node.next;
                    self.insert(node, self, true);
                    node = next;
                }
                self.remove();
            }
function ( ) { var node , next , self = this ; for ( node = self . firstChild ; node ; ) { next = node . next ; self . insert ( node , self , true ) ; node = next ; } self . remove ( ) ; }
Unwraps the node in other words it removes the node but keeps the children.

@example
node.unwrap();

@method unwrap
Unwraps the node in other words it removes the node but keeps the children .