               precedence: 0
               contents: 'arg'
             }
-            #{
-            #  type: 'mutationButton'
-            #  expand: [
-            #    ', '
-            #    {
-            #      type: 'socket'
-            #      precedence: 0
-            #      contents: 'arg'
-            #    }
-            #    0
-            #  ]
-            #}
             ')'
           ]
         }

                {
                  type: 'block'
                  valueByDefault: false
                  color: '#dc322f'
                  children: [
                    'return '
                    {

        ice.parseObj {
          type: 'block'
          valueByDefault: false
          color: 'return'
          precedence: 32
          children: [
            {
