Is there a way to create a requirement that requires a certain number of resources in a city to trigger?
Example: I want a city with 3 or more sources of Wheat to boost a trade routes yield of Food. As far as I've been able to tell, I can set a requirement for having an improved resource (REQUIREMENT_PLOT_RESOURCE_TYPE_MATCHES + REQUIREMENT_PLOT_IMPROVEMENT_TYPE_MATCHES) or set a requirement that there is a resource in the city limits (REQUIREMENT_PLOT_RESOURCE_TYPE_MATCHES).
Example: I want a city with 3 or more sources of Wheat to boost a trade routes yield of Food. As far as I've been able to tell, I can set a requirement for having an improved resource (REQUIREMENT_PLOT_RESOURCE_TYPE_MATCHES + REQUIREMENT_PLOT_IMPROVEMENT_TYPE_MATCHES) or set a requirement that there is a resource in the city limits (REQUIREMENT_PLOT_RESOURCE_TYPE_MATCHES).
