selectProvider

private fnProvider selectProvider(CompressionFormat fmt, const(char)[] providerName)

Pick the best matching provider by format and optional full provider name.

`fmt`	The compression format to find a provider for.
`providerName`	Optional full provider name (e.g., "ddn-gzip"). If empty, the highest priority provider is selected.

The selected provider.

CompressionError if no provider is registered for the format, or if

the requested provider name is not found.

private fnProvider selectProvider(string formatId, const(char)[] providerName)

Pick the best matching provider by string formatId and optional full provider name.

`formatId`	The format identifier string (e.g., "gzip", "bzip2").
`providerName`	Optional full provider name (e.g., "ddn-gzip"). If empty, the highest priority provider is selected.

The selected provider.

CompressionError if no provider is registered for the formatId, or if

the requested provider name is not found.