public HaruCMYKColor getCMYKStroke()
Gets the current value of the page's stroking color.
getCMYKStroke() is valid only when the page's stroking color space is HPDFCSDEVICE_CMYK.
Returns
when getCMYKStroke() succeed, it returns the current value of the page's stroking color. Otherwise it returns {0, 0, 0, 0}.