showsTouchWhenHighlighted on Titanium button

TiUIButton.m

-(UIButton*)button
{
  if (button==nil)
	{
        BOOL hasImage = [self.proxy valueForKey:@"backgroundImage"]!=nil;
       
		
        UIButtonType defaultType = (hasImage==YES) ? UIButtonTypeCustom : UIButtonTypeRoundedRect;
		style = [TiUtils intValue:[self.proxy valueForKey:@"style"] def:defaultType];
		UIView *btn = [TiButtonUtil buttonWithType:style];
		button = (UIButton*)[btn retain];
               
		[self addSubview:button];
		if (style==UIButtonTypeCustom)
		{
			[button setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
		}
		[button addTarget:self action:@selector(controlAction:forEvent:) forControlEvents:UIControlEventAllTouchEvents];
        
    	//------add these lines 
    	if ([TiUtils boolValue:[self.proxy valueForKey:@"showTouch"] def:NO])
    	{
      		button.showsTouchWhenHighlighted = YES;
    	}
        //-------
		button.exclusiveTouch = YES;
	}
	if ((viewGroupWrapper != nil) && ([viewGroupWrapper	superview]!=button)) {
		[viewGroupWrapper setFrame:[button bounds]];
		[button addSubview:viewGroupWrapper];
	}
	return button;
}

yourapp.js

var back = Ti.UI.createButton({
  	height : 44,
	width : 48,
        //how to use
	showTouch : true
});