rename define

    EQUIVALENT_CHAR,

    // It is a char located nearby on the keyboard

    NEAR_PROXIMITY_CHAR,

    // It is an unrelated char

    // It is an unrelated char and could be a substitution char

    UNRELATED_CHAR,

    // It is an unrelated char and not a substitution

    UNRELATED_AND_NOT_SUBSTITUTION_CHAR,

    // It is an unrelated char nor a substitution char

    UNRELATED_NOR_SUBSTITUTION_CHAR,

    // Additional proximity char which can differ by language.

    ADDITIONAL_PROXIMITY_CHAR

} ProximityType;