** Implement to create your own Fancordion commands.
** To use your own command in a specification, add it to the 'FancordionRunner':
**
** syntax: fantom
**
** runner := FancordionRunner()
** myCmd := MyCommand()
** runner.commands["mycmd"] = myCmd
**
mixin Command {
** If 'true' then this command can be ignored should a previous command fail.
**
** Defaults to 'true'.
virtual Bool canFailFast() { true }
** Runs the command with the given URI and text.
abstract Void runCommand(FixtureCtx fixCtx, CommandCtx cmdCtx)
}