microsoft-azure-storage/src/com/microsoft/azure/storage/file/CloudFileDirectory.java
@DoesServiceRequest
    public boolean exists(final AccessCondition accessCondition, FileRequestOptions options, OperationContext opContext)
            throws StorageException {
        return this.exists(false, accessCondition, options, opContext);
    }
@DoesServiceRequest
    public boolean exists(final AccessCondition accessCondition, FileRequestOptions options, OperationContext opContext)
            throws StorageException {
        return this.exists(false, accessCondition, options, opContext);
    }
Returns a value that indicates whether the directory exists, using the specified request options and operation
context.

@param accessCondition
An {@link AccessCondition} object that represents the access conditions for the share.
@param options
A {@link FileRequestOptions} object that specifies any additional options for the request. Specifying
<code>null</code> will use the default request options from the associated service client (
{@link CloudFileClient}).
@param opContext
An {@link OperationContext} object that represents the context for the current operation. This object
is used to track requests to the storage service, and to provide additional runtime information about
the operation.

@return <code>true</code> if the directory exists, otherwise <code>false</code>.

@throws StorageException
If a storage service error occurred.