whole_func_string: function(command) {
  
  	return _.isArray(command)
  
  	    ? _.find(command, function(singleCmd) { return !this._validateCommand(singleCmd); }, this)
  
  	    : this._validateCommand(command);
      }
func_code_string: function(command) {
  
  	return _.isArray(command)
  
  	    ? _.find(command, function(singleCmd) { return !this._validateCommand(singleCmd); }, this)
  
  	    : this._validateCommand(command);
      }
func_documentation_string: iterates throught each command, stops on first invalid command.