returns true if the value is stale , also updates the cachevaluestamp . concode_field_sep int cachedGradientChangeStamp concode_elem_sep CRF crf concode_elem_sep int cachedValueChangeStamp concode_field_sep boolean isGradientStale
boolean function ( ) { if ( crf . weightsValueChangeStamp != cachedValueChangeStamp ) { cachedValueChangeStamp = crf . weightsValueChangeStamp ; return true ; } return false ; }