code: public IconProviderBuilder withSide(EnumFacing side, Icon icon)
  	{
  		setType(Type.SIDES);
  		sidesIcons.put(Objects.requireNonNull(side), icon);
  		return this;
  	}
docs: Sets the {@link Icon} to use for specific side.
  
  @param side the side
  @param icon the icon
  @return the icon provider builder