code: public String getRawComment(String key) {
          Entry entry = props.get(key);
          return entry == null ? null : entry.getRawComment();
      }
docs: Returns the "raw" comment for the specified key, or null if there is none.
  Note that the raw comment may include empty lines or lines which
  contain only whitespace, and non-whitespace lines will include the
  comment marker ("#" or "!").
  
  @param key
  @return