 [det]portray_blob(+Blob, 
+Options)Portray non-text blobs that may appear in output terms. Not really sure 
about that. Basically such terms need to be avoided as they are 
meaningless outside the process. The generated error is hard to debug 
though, so now we send them as
[det]portray_blob(+Blob, 
+Options)Portray non-text blobs that may appear in output terms. Not really sure 
about that. Basically such terms need to be avoided as they are 
meaningless outside the process. The generated error is hard to debug 
though, so now we send them as '$BLOB'(Type). Future 
versions may include more info, depending on Type.