public String getParameter(String name) {
        return getFirstValue(parameters, name);
    }
Returns the value of the HTTP parameter having the given name. Parameter
names are case-sensitive. If no such parameter was present, null is
returned. If the parameter had multiple values, the first value is
returned.

@param name
    The name of the parameter to retrieve. This name is case-sensitive.

@return
    The first value of the HTTP parameter with the given name, or null
    if there is no such parameter.
guacamole-ext/src/main/java/org/apache/guacamole/net/RequestDetails.java