code: @Nonnull
    public CSSDeclaration setProperty (@Nonnull @Nonempty final String sProperty)
    {
      ValueEnforcer.notEmpty (sProperty, "Property");
      m_sProperty = _unifyProperty (sProperty);
      return this;
    }
docs: Set the property of this CSS value (e.g. <code>background-color</code>).
  
  @param sProperty
  The CSS property name to set. May neither be <code>null</code> nor
  empty. The property value is automatically lowercased!
  @return this
  @since 3.7.4