public void execCommand(AceCommand command, AceCommandArgs args) {
        execCommand(command.getName(), args);
    }
Execute a command with arguments (in case args is not null).
See {@link AceCommand} values for example.

@param command the command (one of the values in the
               {@link AceCommand} enumeration)
@param args    command arguments (string or map)
stroom-core-client-widget/src/main/java/edu/ycp/cs/dh/acegwt/client/ace/AceEditor.java