/**
* Specifies the line end width in relation to the line width.
*/
public void setLineTailLength(LineEndLength style){
CTLineProperties ln = getSpPr().getLn();
CTLineEndProperties lnEnd = ln.isSetTailEnd() ? ln.getTailEnd() : ln.addNewTailEnd();
if(style == null){
if(lnEnd.isSetLen()) lnEnd.unsetLen();
} else {
lnEnd.setLen(STLineEndLength.Enum.forInt(style.ordinal() + 1));