text: export default function (target, value) {
    function concat ({state, resolve}) {
      if (!resolve.isTag(target, 'state')) {
        throw new Error('Cerebral operator.concat: You have to use the STATE TAG as first argument')
      }
  
      state.concat(resolve.path(target), resolve.value(value))
    }
  
    concat.displayName = `operator.concat(${String(target)}, ${String(value)})`
  
    return concat
  }
  