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/// returns the Unicode cross mark icon:
/// 🌈 (U+1F308)
pub fn rainbow() -> String {
    "\u{1F308}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🏴‍☠️ (U+2620)
pub fn pirate() -> String {
    "\u{2620}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🏴 (U+1F3F4)
pub fn black() -> String {
    "\u{1F3F4}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🏳 (U+1F3F3)
pub fn white() -> String {
    "\u{1F3F3}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🚩 (U+1F6A9)
pub fn triangular() -> String {
    "\u{1F6A9}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🏁 (U+1F3C1)
pub fn chequered() -> String {
    "\u{1F3C1}".to_string()
}

/// returns the Unicode cross mark icon:
/// 🎌 (U+1F38C)
pub fn crossed() -> String {
    "\u{1F38C}".to_string()
}