Hello community friends.

I am working with the new api 8.0 of odoo 
And Please I need you help... 

I have two fields: field_1 and field_2:

field_1 = fields.Many2one(........, compute='_filling_method')

field_2 = fields.Many2one(........, compute='_filling_method')

... and the _filling_method:

@api.depends('field_1', 'field_2')

def _filling_method(self):
     .......

How I can know what is the trigger field in the method? field_1 or field_2?

@api.depends('field_1', 'field_2')

def _filling_method(self):

     if trigger == 'field_1':
         ......
     if trigger == 'field_2':

         .....

Is there any way?

Thanks a lot.!