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param - java.util.Map
A map of parameters of the request, Map<String, String>.
To retrieve all possible parameter values, use paramValues instead.
${param.something}
${paramValues.something[0]}
Notice that, in zscript, there is no paramValues. In additions, param is a map of possible values, Map<String, String[]>.
<zscript>
String[] values = param.get("something");
</zscript>