code: public static AccessCondition generateIfModifiedSinceCondition(final Date lastMotified) {
          AccessCondition retCondition = new AccessCondition();
          retCondition.ifModifiedSinceDate = lastMotified;
          return retCondition;
      }
docs: Returns an access condition such that an operation will be performed only if the resource has been modified since
  the specified time.
  <p>
  Setting this access condition modifies the request to include the HTTP <i>If-Modified-Since</i> conditional
  header. If this access condition is set, the operation is performed only if the resource has been modified since
  the specified time.
  <p>
  For more information, see <a href= 'http://go.microsoft.com/fwlink/?LinkID=224642'>Specifying Conditional Headers
  for Blob Service Operations</a>.
  
  @param lastMotified
  A <code>java.util.Date</code> object that represents the last-modified time to check for the resource.
  
  @return An <code>AccessCondition</code> object that represents the <i>If-Modified-Since</i> condition.