code: function (purpose) {
      const oThis = this;
  
      for (var chain in setupConfig.chains) {
        // Add comment to ENV
        fileManager.append(setupConfig.env_vars_file, "\n# "+chain+" chain");
        // Add content
        oThis._scanAndPopulateEnvVars(setupConfig.chains[chain],purpose);
      }
    }
docs: Populate all chains related env variables