Split button
Button with a default action and a drop-down list of other predefined actions
Inputs in Responsive
display ?: SplitButtonDisplay = 'inline'
displayDesktop ?: SplitButtonDisplay
Also set in this example
color : ButtonColor
size : ButtonSize
Outputs
optionSelected ?: any = new EventEmitter<SplitButtonOption>()
primaryClicked ?: any = new EventEmitter<void>()