if (rb_obj_is_kind_of (props, rb_cHash) == Qfalse ||
!RHASH (props)->tbl->num_entries)
rb_raise (ePropError, "invalid EET properties");
if (rb_obj_is_kind_of (props, rb_cHash) == Qfalse ||
!RHASH (props)->tbl->num_entries)
rb_raise (ePropError, "invalid EET properties");