That is similar to asking what a game of soccer looks like when no goals are scored. It could be quite an interesting game, nevertheless.
Growth is a consequence, not the cause of economic wherewithal. Meaning, economies perform best not when they grow for growth sake (a temporal and forced agenda), but when they grow as a result of the strength of renewal of its resources.
Growth will then be the natural outcome, a fractal of growth derived from the natural expansion of its performance — the standard of living in perfect equilibrium with the strength of resources that affords so.
A rat-race for growth does not, by definition, contribute positively to humanity, in the same way, a high score in a game of soccer does not at all indicate better gameplay.