SVG_PRESERVEASPECTRATIO_XMINYMIN constant
int SVG_PRESERVEASPECTRATIO_XMINYMIN = 2© 2012 the Dart project authors
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https://api.dartlang.org/stable/1.24.3/dart-svg/PreserveAspectRatio/SVG_PRESERVEASPECTRATIO_XMINYMIN-constant.html