protected void initUsageMap() {
    usageMap.put("gemfire", "gemfire [-debug] [-h[elp]] [-q] [-J<vmOpt>]*");
    usageMap.put("version", "version");
    usageMap.put("help", "help [" + join(helpTopics, "|") + "]");
    usageMap.put("stats",
        "stats ([<instanceId>][:<typeId>][.<statId>])* [-details] [-nofilter|-persec|-persample] [-prunezeros] [-starttime=<time>] [-endtime=<time>] -archive=<statFile>");
    usageMap.put(START_LOCATOR,
        "start-locator [-port=<port>] [-address=<ipAddr>] [-dir=<locatorDir>] [-properties=<gemfire.properties>] [-peer=<true|false>] [-server=<true|false>] [-hostname-for-clients=<ipAddr>] [-D<system.property>=<value>] [-X<vm-setting>]");
    usageMap.put("stop-locator",
        "stop-locator [-port=<port>] [-address=<ipAddr>] [-dir=<locatorDir>]");
    usageMap.put("status-locator", "status-locator [-dir=<locatorDir>]");
    usageMap.put("info-locator", "info-locator [-dir=<locatorDir>]");
    usageMap.put("tail-locator-log", "tail-locator-log [-dir=<locatorDir>]");
    usageMap.put("merge-logs", "merge-logs <logFile>+ [-out=<outFile>]");
    usageMap.put("validate-disk-store", "validate-disk-store <diskStoreName> <directory>+");
    usageMap.put("upgrade-disk-store",
        "upgrade-disk-store <diskStoreName> <directory>+ [-maxOplogSize=<int>]");
    usageMap.put("compact-disk-store",
        "compact-disk-store <diskStoreName> <directory>+ [-maxOplogSize=<int>]");
    usageMap.put("compact-all-disk-stores", "compact-all-disk-stores");
    usageMap.put("modify-disk-store",
        "modify-disk-store <diskStoreName> <directory>+ [-region=<regionName> [-remove|(-lru=<none|lru-entry-count|lru-heap-percentage|lru-memory-size>|-lruAction=<none|overflow-to-disk|local-destroy>|-lruLimit=<int>|-concurrencyLevel=<int>|-initialCapacity=<int>|-loadFactor=<float>|-statisticsEnabled=<boolean>)*]]");
    usageMap.put("list-missing-disk-stores", "list-missing-disk-stores");
    usageMap.put("export-disk-store",
        "export-disk-store <diskStoreName> <directory>+ [-outputDir=<directory>]");
    usageMap.put("shut-down-all", "shut-down-all [timeout_in_ms]");
    usageMap.put("backup", "backup [-baseline=<baseline directory>] <target directory>");
    usageMap.put("revoke-missing-disk-store", "revoke-missing-disk-store <disk-store-id>");
    usageMap.put("print-stacks", "print-stacks [-all-threads] [<filename>]");
  }
Represents a list of ResourceInst that have been combined together. Note the most common case
is for this class to only own a single ResourceInst.
geode-core/src/main/java/org/apache/geode/internal/SystemAdmin.java