private String getBinPath(String jobInstallPath) {
    return Paths.get(jobInstallPath, BIN_SUBPATH).toString();
  }
@param jobInstallPath  the root path of the job installation.
@return                the bin directory within the job installation.
samza-rest/src/main/java/org/apache/samza/rest/proxy/installation/SimpleInstallationFinder.java