code: public Map<String, String> getPropertyMapForPrefix(String prefix) {
          Iterator<String> keys = mProperties.getKeys(prefix);
          Map<String, String> map = new HashMap<String, String>();
          while (keys.hasNext()) {
              String key = keys.next();
              String value = mProperties.getString(key);
              map.put(key.substring(prefix.length() + 1), value);
          }
          return map;
      }
docs: This method is used for fetching all the properties which start with the given prefix.
  It returns a Map of all those key-val.
  
  e.g.
  a.b.c=val1
  a.b.d=val2
  a.b.e=val3
  
  If prefix is a.b then,
  These will be fetched as a map {c = val1, d = val2, e = val3}
  
  @param prefix property prefix
  @return