dart:core toLowerCase method    String toLowerCase()  Converts all characters in this string to lower case. If the string is already in all lower case, this method returns this. 'ALPHABET'.toLowerCase(); // 'alphabet'
'abc'.toLowerCase(); // 'abc' This function uses the language independent Unicode mapping and thus only works in some languages. Implementation // TODO(floitsch): document better. (See EcmaScript for description).
String toLowerCase();

    
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