batch mutate + deletion + slice range predicate unsupported

[B. Todd Burruss]

i just figured out that can't do a batch mutate + deletion that uses a 
slice range predicate.  is adding this functionality targeted for a 
particular release?  what i am trying to do is delete the first X 
columns in a row.  i can get around it by requesting all the columns in 
question and then removing, but not as optimal.

InvalidRequestException(why:Deletion does not yet support SliceRange 
predicates.)
    at 
org.apache.cassandra.thrift.Cassandra$batch_mutate_result.read(Cassandra.java:15345)
    at 
org.apache.cassandra.thrift.Cassandra$Client.recv_batch_mutate(Cassandra.java:796)
    at 
org.apache.cassandra.thrift.Cassandra$Client.batch_mutate(Cassandra.java:772)