code: function processOutput(plugins, outputObject, configObject, baseContracts, contracts, environment, callback) { // eslint-disable-line
    // the final string to be outputed
    let outputString = JSON.stringify(outputObject, null, 2); // eslint-disable-line
  
    // the err msg base
    const errMsgBase = 'while processing output with plugins, ';
    if (!Array.isArray(plugins)) { return callback(error(`${errMsgBase}plugins must be type Array, got ${typeof plugins}`)); }
  
    // process deployers
    try {
      plugins.forEach((plugin) => {
        // process deployer method
        outputString = plugin.process({ output: outputString, config: configObject, baseContracts, contracts, environment });
      });
  
      // return final output string
      callback(null, outputString);
    } catch (deployerError) {
      callback(error(`${errMsgBase}plugins error: ${deployerError}`));
    }
  }
docs: Process the final load output into string output for file creation.
  
  @method processOutput
  @param {Array} plugins the array of plugins, if any
  @param {Object} outputObject the deplyed contracts
  @param {Object} configObject the config js object
  @param {Function} callback the method callback that returns the final string output
  @callback {String} outputString the loaded contracts