def define_env(env):
    """
    This is the hook function for the variables, macros and filters.
    """

    @env.macro
    def ScheduleTableHead():
        code = '''| <div style="width:110px">**Time**</div> | **Machine State** | **Description** | <div style="width:90px"> **Contact**</div> | 
        | :- | :- |:- |:- |'''
        return code