code: @Nonnull
      public String getCommandName() {
          String c = commandName;
          if (c != null)
              return c;
          return getArchitecture().getCommand();
      }
docs: Returns the name (possibly with path) of the binary used to execute qemu.
  
  This is derived from {@link #getArchitecture()} if not explicitly
  set using {@link #setCommandName(java.lang.String)}.