Setting default arguments for music function?

[Ahanu Banerjee]

Is it possible to specify default values for a function to use when arguments are missing? In the example below, I want the default font size to be -4 and the default color to be blue without having to specify it each time, but I also want the ability to change those values in rare cases.

\version "2.24"

\language "english" 

altParen = #(define-music-function

     (parenColor parenSize parenItem)

     (color? number? ly:music?)

   #{

     \tweak Parentheses.font-size #parenSize \tweak Parentheses.color #parenColor \parenthesize #parenItem

   #})

{ c \altParen "blue" #-4 \upbow }

Thanks,

-Ahanu