private static bool UnpackFixRawLength( StreamingUnpacker @this, int b, Stream source, UnpackingMode unpackingMode, out MessagePackObject? result )
		{
			@this.TransitToUnpackRawBytes( unchecked( ( uint )( b & 0x1f ) ) );
			// Try to get body.
			return @this.UnpackRawBytes( source, unpackingMode, out result );
		}