ConstReadonlyDESCRIPTION_ELEMENT_TYPE_ALL: "DESCRIPTION_ELEMENT_TYPE_ALL"All supported element types.
ReadonlyDESCRIPTION_ELEMENT_TYPE_FIGURE: "DESCRIPTION_ELEMENT_TYPE_FIGURE"Figures.
ReadonlyDESCRIPTION_ELEMENT_TYPE_UNSPECIFIED: "DESCRIPTION_ELEMENT_TYPE_UNSPECIFIED"
An element type that AI descriptions can be generated for.