Static Resource URL in Apex

Question is how to get the Static Resource's URL in Apex, so below is the function which will return the relative URL (also supports namespace-resources)

public class StaticResourceURL
{
    //Pass the resource name
    public static String GetResourceURL(String resourceName)
    {
        //Fetching the resource
        List resourceList = [SELECT Name, NamespacePrefix, SystemModStamp FROM StaticResource WHERE Name = :resourceName];
                            
        //Checking if the result is returned or not
        if(resourceList.size() == 1)
        {
           //Getting namespace
           String namespace = resourceList[0].NamespacePrefix;
           //Resource URL
           return '/resource/' + resourceList[0].SystemModStamp.getTime() + '/' + (namespace != null && namespace != '' ? namespace + '__' : '') + resourceName; 
        }
        else return '';
    }
}

Use this in debug logs to verify :

System.debug(':::: ' + StaticResourceURL.GetResourceURL('StaticResourceName')) ;

*Please change the "StaticResourceName" with your Static resource name in above line