{nesting_opt_parameter}
Hi
{/nesting_opt_parameter}

{nesting_opt_parameter optional="bla"}
Hi
{/nesting_opt_parameter}

{nesting_req_parameter required="haha"}
NOOOOOoooooo
{/nesting_req_parameter}

{nesting_req_opt_parameter required="haha"}
NOOOOOoooooo
{/nesting_req_opt_parameter}

{nesting_req_opt_parameter required="haha" optional="bla"}
NOOOOOoooooo
{/nesting_req_opt_parameter}

{nesting_req_startexpression "Bla"}
NOOOOOoooooo
{/nesting_req_startexpression}

{nesting_opt_startexpression "Bla"}
NOOOOOoooooo
{/nesting_opt_startexpression}

{nesting_opt_startexpression}
NOOOOOoooooo
{/nesting_opt_startexpression}