SP -= items; /* make the local SP point at our ST(0) */
PUSHMARK(SP); /* make the next function's ST(0) be that */
SPAGAIN; /* reset our local SP to the global "top of current stack" */
int retvals = perl_call_method("new", G_SCALAR); /* call method so has right stack frame */
SPAGAIN; /* set our local SP to the global "top of current stack" */
if (retvals != 1) barf("new returned no values"); /* use croak in non-PDL code */
RETVAL = POPs; /* set the SV* to the return value */