code: public static AccessCondition generateIfMatchCondition(final String etag) {
          AccessCondition retCondition = new AccessCondition();
          retCondition.setIfMatch(etag);
          return retCondition;
      }
docs: Returns an access condition such that an operation will be performed only if the resource's ETag value matches
  the specified ETag value.
  <p>
  Setting this access condition modifies the request to include the HTTP <i>If-Match</i> conditional header. If
  this access condition is set, the operation is performed only if the ETag of the resource matches the specified
  ETag.
  <p>
  For more information, see <a href= 'http://go.microsoft.com/fwlink/?LinkID=224642'>Specifying Conditional Headers
  for Blob Service Operations</a>.
  
  @param etag
  A <code>String</code> that represents the ETag value to check.
  
  @return An <code>AccessCondition</code> object that represents the <i>If-Match</i> condition.