code: function compileDefinition(def) {
    if (_.isArray(def)) {
      return _.map(def, compileDefinition);
    }
  
    try {
      if (def[0] == '{') {
        // Plain object defined behaviour => wrap in braces.
        return eval(`(${def})`);
      }
      else if (def[0] == '[') {
        // Definition array => first deserialize array, then definitions inside.
        let behArr = eval(`(${def})`);
  
        return _.map(behArr, item => compileDefinition(item));
      }
  
      return eval(def);
    }
    catch (err) {
      parentPort.postMessage({ error: 'Compilation error: ' + err });
  
      process.exit(1);
    }
  }
docs: Compiles a serialized actor definition.
  
  @param {String|String[]} def Serialized definition.
  @returns {*} Compiled actor definition.