public static SortedSet<Integer> findAvailableTcpPorts(int numRequested) {
        return findAvailableTcpPorts(numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
    }
Find the requested number of available TCP ports, each randomly selected
from the range [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
@param numRequested the number of available ports to find
@return a sorted set of available TCP port numbers
@throws IllegalStateException if the requested number of available ports could not be found
agent-module/plugins-test-module/testcase/src/main/java/com/navercorp/pinpoint/testcase/util/SocketUtils.java