jdr/jboss-as-jdr/src/main/java/org/jboss/as/jdr/commands/CallAS7.java
public CallAS7 param(String key, String val) {
        this.parameters.put(key, val);
        return this;
    }
public CallAS7 param(String key, String val) {
        this.parameters.put(key, val);
        return this;
    }
adds a key/value parameter pair to the call

@param key
@param val
@return this