In Sunday’s Scottish Cup semi-final against St Mirren, Forrest was aggressive when Celtic had lapsed into timidity. He was full of verve when too many of his team-mates were toiling. He was the spark.

He’s a bit-part winger these days and for many other days that went before.

Forrest has started seven games this season, 11 the season before and single figures for the two seasons before that. Part of that was influenced by injury but in other part it was down to the arrival of shiny new wingers who haven’t been anything like as shiny as Celtic hoped.

Expensive, too. Sebastian Tounekti and Michel-Ange Balikwisha are the latest two but, for years, Forrest has counted them in and counted them back out again – Marian Shved, Luis Palma, Marco Tilio, Nicolas Kuhn, Liel Abada. Some successful, some not, some others who just disappeared into thin air.

That is far from a complete list of Celtic’s wide men in recent times. Regardless, Forrest remains the constant, the great survivor and the enduring influencer.