code: @Nonnull
    public CSSValue setProperty (@Nonnull final ICSSProperty aProperty)
    {
      m_aProperty = ValueEnforcer.notNull (aProperty, "Property");
      return this;
    }
docs: Set the property of this CSS value (e.g. <code>background-color</code>).
  
  @param aProperty
  The CSS property to set. May not be <code>null</code>.
  @return this
  @since 3.7.3