Returns an {@link IFileStore} instance for each file and directory contained within this store.
@param options bit-wise or of option flag constants (currently only {@link EFS#NONE}is applicable).
@param monitor a progress monitor, or
null
if progressreporting and cancellation are not desired
@return The children of this store, or an empty array if thisstore has no children.
@exception CoreException if this method fails. Reasons include:
- This store does not exist.
@see IFileTree#getChildStores(IFileStore)