MASK_MODE_BACKGROUND
MASK_MODE_BACKGROUND: "MASK_MODE_BACKGROUND"
MASK_MODE_DEFAULT
MASK_MODE_DEFAULT: "MASK_MODE_DEFAULT"
MASK_MODE_FOREGROUND
MASK_MODE_FOREGROUND: "MASK_MODE_FOREGROUND"
MASK_MODE_SEMANTIC
MASK_MODE_SEMANTIC: "MASK_MODE_SEMANTIC"
MASK_MODE_USER_PROVIDED
MASK_MODE_USER_PROVIDED: "MASK_MODE_USER_PROVIDED"
Enum representing the mask mode of a mask reference image.