Make explore an inline method
Make explore an inline method

This avoids both the closure creation, and the boxing if the result is primitive.

lampepfl/dotty,sjrd/dotty,dotty-staging/dotty,sjrd/dotty,lampepfl/dotty,dotty-staging/dotty,sjrd/dotty,dotty-staging/dotty,sjrd/dotty,sjrd/dotty,lampepfl/dotty,dotty-staging/dotty,lampepfl/dotty,dotty-staging/dotty,lampepfl/dotty