core/src/in/srain/cube/cache/CacheManager.java
public void clearDiskCache() {
        if (null != mFileCache) {
            try {
                mFileCache.getDiskCache().clear();
            } catch (IOException e) {
                if (DEBUG) {
                    e.printStackTrace();
                }
            }
        }
    }
public void clearDiskCache() {
        if (null != mFileCache) {
            try {
                mFileCache.getDiskCache().clear();
            } catch (IOException e) {
                if (DEBUG) {
                    e.printStackTrace();
                }
            }
        }
    }
clear the disk cache