setAltrefRefreshPeriod method
Replace altrefRefreshPeriod at runtime. Takes effect on the
next inter frame. v must be >= 0 (0 falls back to the static
refreshAltrefOnInter flag). Does NOT immediately refresh
ALTREF -- use requestAltrefRefresh for that.
Implementation
void setAltrefRefreshPeriod(int v) {
if (v < 0) {
throw ArgumentError('setAltrefRefreshPeriod: v must be >= 0 (got $v)');
}
_altrefRefreshPeriod = v;
}