preserveOnlyChars function

String preserveOnlyChars(
  1. String string,
  2. String validChars, {
  3. String? replacementChar,
})

Returns a String that is made of some required chars only. Optionally the removed characters can be substituted with a replacement char

Implementation

String preserveOnlyChars(String string, String validChars,
        {String? replacementChar}) =>
    string.preserveOnlyChars(validChars, replacementChar: replacementChar);