Function object_set_material_text 

pub unsafe fn object_set_material_text(
    object: *mut IObject,
    material_index: u32,
    text: StringView,
    material_size: i32,
    font_face: StringView,
    font_size: i32,
    bold: bool,
    font_colour: Colour,
    background_colour: Colour,
    align: i32,
)

void IBaseObject::setMaterialText(uint32_t, StringView, ObjectMaterialSize, StringView, int, bool, Colour, Colour, ObjectMaterialTextAlign).

Safety

object must be a live IObject.