docs: public static IPlatformAdapter getInstance() {
          if (svInstance != null) {
              return svInstance;
          }
  
          synchronized (PlatformAdapterAccessor.class) {
              if (svInstance != null) {
                  // need to check again in case one thread waited on sync block while
                  // another
                  // initialized the instance
                  return svInstance;
              }
              String adapterClassName = null;
              try {
                  adapterClassName = AccessController.doPrivileged(new PrivilegedExceptionAction<String>()
                  {
                      @Override
                      public String run() throws Exception
                  {
                      return System.getProperty(ADAPTER_NAME_PROP);
                  }
                  });
  
                  if (adapterClassName != null) {
                      // The loaded class must be an instanceof IPlatformAdapter - if not,
                      // the following
                      // line will throw a ClassCastException indicating that the specified
                      // value of the
                      // adapterName property was not a class that implemented
                      // IPlatformAdapter.
                      // This should be a very rare occurrence.
                      Class<? extends IPlatformAdapter> clazz = (Class<? extends IPlatformAdapter>) Class.forName(adapterClassName);
                      svInstance = clazz.newInstance();
                  } else {
                      // Expected on Sun/Hybrid/Java 6 VMs
                      svInstance = new DefaultPlatformAdapter();
                  }
              } catch (Throwable t) {
                  // this means we are in a Harmony Java 7 VM, but are unable to
                  // initialize
                  // the Harmony platform adapter - this is a fatal error to most WAS
                  // processes - must log FFDC and error message, and throw an exception
                  // TODO: NLS-ize
                  Tr.error(tc, "<Need new error message> - Failed to initialize {0}", new Object[] { adapterClassName });
                  // Alex Ffdc.log(t, PlatformAdapterAccessor.class, CLASSNAME, "46");
                  // throw new
                  // IllegalStateException("Unable to initialize VM PlatformAdapter: " +
                  // adapterClassName, t);
                  // in this case, we need to use the default adapter -- but expect
                  // erroneous behavior...
                  svInstance = new DefaultPlatformAdapter();
              }
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled()) {
              Tr.debug(tc, "chosen adapter is: " + svInstance.getClass().getName());
          }
  
          return svInstance;
      }