diarch_syphon_treasury_interaction_syphon_development_growth_effect

diarch_syphon_treasury_interaction_syphon_development_growth_effect = {
	# First, configure the development growth loss to be divided.
	save_scope_value_as = {
		name = county_attribute_loss
		value = $LOSS$
	}
	if = {
		limit = { scope:county_attribute_loss = massive_development_progress_loss }
		custom_tooltip = diarch_syphon_treasury_interaction_syphon_development_growth_massive_tt
	}
	else_if = {
		limit = { scope:county_attribute_loss = major_development_progress_loss }
		custom_tooltip = diarch_syphon_treasury_interaction_syphon_development_growth_major_tt
	}
	else_if = {
		limit = { scope:county_attribute_loss = medium_development_progress_loss }
		custom_tooltip = diarch_syphon_treasury_interaction_syphon_development_growth_medium_tt
	}
	else = { custom_tooltip = diarch_syphon_treasury_interaction_syphon_development_growth_minor_tt }
	# Now, execute our general effects.
	hidden_effect = {
		while = {
			count = syphon_treasury_recipient_county_tally
			random_held_county = {
				limit = {
					NOT = {
						save_temporary_scope_as = current_county
						any_in_list = {
							list = syphon_treasury_affected_counties
							this = scope:current_county
						}
					}
				}
				change_development_progress = syphon_treasury_county_attribute_loss_fraction
				add_to_list = syphon_treasury_affected_counties
			}
		}
	}
}

As written in game/common/scripted_effects/00_diarchy_scripted_effects.txt.