Конструктор Float64x2.fromFloat32x4
Использует проходы "x" и "y" из v.
Реализация
external factory Float64x2.fromFloat32x4(Float32x4 v);
© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-typed_data/Float64x2/Float64x2.fromFloat32x4.html
