Why Hadoop FileSystem class does not have a Copy method?

[arbin]

I am wondering why the FileSystem class of org.apache.hadoop.fs package does not have a Copy method. I see that it has CopyFromLocalFile method but I do not see a copy method to copy files from one place to another within the file system. I do see Copy methods in the FileUtil class in the same package that does the job but am wondering what would the reason about the absence of a similar functionality in the FileSystem class.