code: public Object getAttribute(String attributeName) {
  
          if (m_attributeMap == null) {
              return null;
          }
          return m_attributeMap.get(attributeName);
      }
docs: Gets the value of an attribute from the OpenCms request context attribute list.<p>
  
  @param attributeName the attribute name
  @return Object the attribute value, or <code>null</code> if the attribute was not found