Function FallbackIcon

src/components/MaterialCommunityIcon.tsx:72–91

({ name, color, size, ...rest }: IconProps)

 * Fallback component displayed when no icon library is available
 */
const FallbackIcon = ({ name, color, size, ...rest }: IconProps) => {
  console.warn(
    `Tried to use the icon '${name}' in a component from 'react-native-paper', but none of the required icon libraries are installed.`,
    `To fix this, please install one of the following:\n` +
      `- @expo/vector-icons\n` +
      `- @react-native-vector-icons/material-design-icons\n` +
      `- react-native-vector-icons\n\n` +
      `You can also use another method to specify icon: https://callstack.github.io/react-native-paper/docs/guides/icons`
  );

  return (
    <Text
      {...rest}
      style={[styles.icon, { color, fontSize: size }]}
      selectable={false}
    >
      □
    </Text>
  );
};

const MaterialCommunityIcons: IconModuleType = IconModule || FallbackIcon;