code: function(sStyle, sPattern) {
  			check(sStyle == "short" || sStyle == "medium" || sStyle == "long" || sStyle == "full", "sStyle must be short, medium, long or full");
  			this._set("dateFormats-" + sStyle, sPattern);
  			return this;
  		}
docs: Defines the preferred format pattern for the given date format style.
  
  Calling this method with a null or undefined pattern removes a previously set pattern.
  
  If a pattern is defined, it will be preferred over patterns derived from the current locale.
  
  See class {@link sap.ui.core.format.DateFormat} for details about the pattern syntax.
  
  After changing the date pattern, the framework tries to update localization
  specific parts of the UI. See the documentation of {@link sap.ui.core.Configuration#setLanguage}
  for details and restrictions.
  
  @param {string} sStyle must be one of short, medium, long or full.
  @param {string} sPattern the format pattern to be used in LDML syntax.
  @return {sap.ui.core.Configuration.FormatSettings} Returns <code>this</code> to allow method chaining
  @public