Jade mixin

[SaidTayebi]

HI,

How can I include a jade mixin ? I seems that's nor working.
I got this error

Running "jade:compile" (jade) task
File .tmp/app/account/login/login.html created.
File .tmp/app/account/settings/settings.html created.
File .tmp/app/account/signup/signup.html created.
File .tmp/app/admin/admin.html created.
File .tmp/app/main/main.html created.
>> Jade failed to compile "client/app/requests/jade/mixin/requestsTab.jade".
>> TypeError: client/app/requests/jade/mixin/requestsTab.jade:1
>> > 1| mixin requestsTab(tabLabel, filter)
>> 2| md-tab(label=tabLabel)
>> 3| md-item(ng-repeat="request in requests | filter:{status: filter}")
>> 4| div(flex)
>>
>> Object # has no method 'requestsTab'
>> Destination not written because compiled files were empty.
>> Jade failed to compile "client/app/requests/requests.jade".
>> TypeError: client/app/requests/jade/mixin/requestsTab.jade:1
>> > 1| mixin requestsTab(tabLabel, filter)
>> 2| md-tab(label=tabLabel)
>> 3| md-item(ng-repeat="request in requests | filter:{status: filter}")
>> 4| div(flex)
>>
>> Object # has no method 'requestsTab'
>> Destination not written because compiled files were empty.
File .tmp/components/jade/mixin/requestsTab.html created.
File .tmp/components/modal/modal.html created.
File .tmp/components/navbar/navbar.html created.