return null;
    }

    /**
     * @deprecated this was unused and has no replacement, this method is a no-op now.
     */
    @Deprecated(since = "4.0.0")
    public void setMergeId(String mergeId) {
    }
            ]]>
            </code>
        </codeSegment>
        <codeSegment>
          <version>4.0.0+</version>
          <code>
            <![CDATA[

        String src = source.getMergeId();
        if (src != null) {
            if (sourceDominant || target.getMergeId() == null) {
                target.setMergeId(src);
            }
        }
    }

    protected void mergeFileSet(FileSet target, FileSet source, boolean sourceDominant, Map<Object, Object> context) {