NS_NewMathMLmtrFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
NS_NewMathMLmtrFrame(nsIPresShell* aPresShell)
NS_NewMathMLmtrFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame){  return NS_NewTableRowFrame(aPresShell, aNewFrame);}