dart:core
length property int length  The length of the string. Returns the number of UTF-16 code units in this string. The number of runes might be fewer, if the string contains characters outside the Basic Multilingual Plane (plane 0): 'Dart'.length;          // 4
'Dart'.runes.length;    // 4

var clef = '\u{1D11E}';
clef.length;            // 2
clef.runes.length;      // 1
 Source  int get length;

    
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