Class must be either be declared abstract or implement abstract method

[rushiiMachine]

Was having trouble not using IHasModel, got linked to your example mod. When using the ModCreativeTabs i get an error from intelliJ like this:

Class 'Anonymous class derived from CustomCreativeTab' must either be declared abstract or implement abstract method 'getTabIconItem()' in 'CreativeTabs'

Here:

public static final CustomCreativeTab CREATIVE_TAB = new CustomCreativeTab(MOD_ID, true) {
    @Override
    public ItemStack createIcon() {
        return TAB_ICON_ITEMSTACK;
    }
};

Also get an error further down the code like this:

Method does not override method from its superclass

Here:

@SideOnly(Side.CLIENT)
@Override
abstract public ItemStack createIcon();

Link to my class: Github

[Cadiboo]

Solved by updating MCP mappings. Relevant forums post http://www.minecraftforge.net/forum/topic/69832-trouble-with-cadiboos-example-mod/