nl_tokens: toolkey toolDefinition are required . If group is not specified will pick the last group if index isnt defined will append to group
pl_tokens: function ( toolKey , toolDefinition , group , index ) { taRegisterTool ( toolKey , toolDefinition ) ; angular . forEach ( toolbars , function ( toolbarScope ) { toolbarScope . addTool ( toolKey , toolDefinition , <mask> , index ) ; } ) ; }