/// <summary>
 ///     Gets instance of the <see cref="A.SolidFill" /> class.
 /// </summary>
 /// <returns><see cref="A.SolidFill" /> instance or NULL.</returns>
 public static A.SolidFill SolidFill(this A.RunProperties aRunProperties)
 {
     return(aRunProperties.GetFirstChild <A.SolidFill>());
 }