propMap.put(CRAWLER_METADATA_NAME_MAPPING, params);
        }
        return params.get(name);
    }

    default void addCrawlerMetadataNameMapping(final String name, final String fieldName, final String mappingType,
            final String dateFormat) {
        if (getCrawlerMetadataNameMapping(name) != null) {
            return;
        }

        @SuppressWarnings("unchecked")

        <field xml.tagName="role-hint">
          <name>roleHint</name>
          <type>String</type>
          <description></description>
        </field>
        <field xml.tagName="field-name">
          <name>fieldName</name>
          <required>true</required>
          <type>String</type>
          <description>The field name which has this requirement.</description>
        </field>
      </fields>
    </class>

 * <li><code>merge<i>Classname</i>( <i>Classname</i> target, <i>Classname</i> source, boolean sourceDominant,
 * Map&lt;Object, Object&gt; context )</code> for each model class</li>
 * <li><code>merge<i>Classname</i>_<i>FieldName</i>( <i>Classname</i> target, <i>Classname</i> source, boolean
 * sourceDominant, Map&lt;Object, Object&gt; context )</code> for each field of each model class</li>