How to place the Groovy in centralized Groovy Library and access that class from any script

This is just a simple example I wrote for my team and thought I would share with you. What I found challenging was when to use a $ for a variable and when is it left off and how to handle that within strings for Groovy. My team also pulls all data from a datasource so the actual call in the second snippet has a data source property values instead of an actual hard coded values.

Code from Utils.groovy:

class Utils{ 

   
    def static doXmlCountComparison(String xmlApiRequest, String xmlApiResponseXpath, String xmlDbRequest, String xmlDbResponseXpath, log, context) 
    {

        def apiCount = context.expand( '${'+xmlApiRequest+'#ResponseAsXml#count('+xmlApiResponseXpath+')}' )
        def dbCount = context.expand( '${'+xmlDbRequest+'#ResponseAsXml#count('+xmlDbResponseXpath+')}' )
        
        assert apiCount == dbCount
    }
}

Utils.doXmlCountComparison('getThings','//ns1:things/ns1:e','JDBC','//Row',log,context)

The above is a groovy snippet in the test case.

My scripts folder is set Globally within Preferences.