ProcessResult represents the result of running a non-interactive process started with Process.run.

abstract class ProcessResult {
 /**
  * Exit code for the process.
  */
 int get exitCode;

 /**
  * Standard output from the process as a string.
  */
 String get stdout;

 /**
  * Standard error from the process as a string.
  */
 String get stderr;

 /**
  * Process id from the process.
  */
 int get pid;
}