code: public static String getAttributeSegmentName(String segmentName) {
          Preconditions.checkArgument(!segmentName.endsWith(ATTRIBUTE_SUFFIX), "segmentName is already an attribute segment name");
          return segmentName + ATTRIBUTE_SUFFIX;
      }
docs: Gets the name of the meta-Segment mapped to the given Segment Name that is responsible with storing extended attributes.
  
  @param segmentName The name of the Segment to get the Attribute segment name for.
  @return The result.