code: @Nonnull
    public BootstrapSpacingBuilder side (@Nonnull final EBootstrapSpacingSideType eSide)
    {
      ValueEnforcer.notNull (eSide, "Side");
      m_eSide = eSide;
      return this;
    }
docs: Set the edge type. Default is "all".
  
  @param eSide
  Edge type. May not be <code>null</code>.
  @return this for chaining