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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def get_current_target(module, module_parameter=None, action_parameter=None):
    '''
    Get the currently selected target for the given module.

    module
        name of the module to be queried for its current target

    module_parameter
        additional params passed to the defined module

    action_parameter
        additional params passed to the 'show' action

    CLI Example (current target of system-wide ``java-vm``):

    .. code-block:: bash

        salt '*' eselect.get_current_target java-vm action_parameter='system'

    CLI Example (current target of ``kernel`` symlink):

    .. code-block:: bash

        salt '*' eselect.get_current_target kernel
    '''
    result = exec_action(module, 'show', module_parameter=module_parameter, action_parameter=action_parameter)[0]
    if not result:
        return None

    if result == '(unset)':
        return None

    return result