Opens the preferred available vendor for this host, or null when none is installed.

Default engine resolution happens once. A null binding leaves every supported dense and sparse BLAS operation available through portable Kotlin. Explicit callers handle a null result themselves.

only restricts the search to one vendor, which is how a test or an exact benchmark arm reaches a specific library without changing anything process-global. Without it the order is Vendor.select's, so a host with no tuned library still reaches Vendor.OpenBlas at the end of that order rather than nothing.

Opens an optional desktop FFM binding, or returns null on portable runtimes.

Opens the preferred available vendor for this host, or null when none is installed.