library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;

static method foo(core::Map<core::String, core::String> m) → dynamic {
  function bar<X extends Z% = dynamic, Y extends core::Object? = dynamic, Z extends core::Object? = dynamic>({required core::Map<Y%, Z%> m = #C1}) → void {}
  bar<core::String, core::String, core::String>(m: m){({required m: core::Map<core::String, core::String>}) → void};
}
static method main() → dynamic {}

constants  {
  #C1 = null
}