how can i display special unicode symbols like Upwards white Arrow (0x21E7) or Erase to the Left (0x232B)?

[DJean.3]

to draw the unicode 'q' character for example we can use this instructions:

void CustomContainer::draw(const Rect& invalidatedArea) const{
  Font* font = FontManager::getFont(Typography::DEFAULT);
  if (font != 0){
    // Setup visuals for h-center of "string"
    LCD::StringVisuals visuals;
    visuals.font = font;
    visuals.alignment = CENTER;
    visuals.color = colortype(0xFF0000FF);
 
    Unicode::UnicodeChar character[2] = { 0, 0 }; 
    uint16_t fontHeight = font->getMinimumTextHeight();	
 
    Unicode::UnicodeChar c = 'q';
		if (c != 0){
				Rect Area1(50,20,40,20) ;
				uint16_t offset = (Area1.height - fontHeight) / 2;
 
				Rect invalidatedAreaRelative = Area1& invalidatedArea;
				Area1.y += offset;
				Area1.height -= offset;
				invalidatedAreaRelative.x -= Area1.x;
				invalidatedAreaRelative.y -= Area1.y;
	
				character[0] = c;
				translateRectToAbsolute(Area1);
				HAL::lcd().drawString(Area1, invalidatedAreaRelative, visuals, character);
		}		
	}
}

now how to display Unicode symbols like:

Upwards white Arrow ( Unicode 0x21E7)

Erase to the Left (Unicode = 0x232B )

or White Heavy Check Mark symbol (Unicode = 0x2705 )