public void setAnt(NodoBtree <T> cabeza)
 {
     anterio = cabeza;
 }
 public void setSig(NodoBtree <T> nuevo)
 {
     this.sig = nuevo;
 }
 public NodoBtree(T info, NodoBtree <T> sig)
 {
     this.info = info;
     this.sig  = sig;
 }
 public NodoBtree(T info, NodoBtree <T> sig, NodoBtree <T> ant)
 {
     this.info    = info;
     this.sig     = sig;
     this.anterio = ant;
 }
 public NodoBtree()
 {
     this.info    = default(T);
     this.sig     = null;
     this.anterio = null;
 }