Browser warnings when created notifications as global mixin

[Yorikkk]

Hello!
I want to create showError and showSuccess notifications one time and use its as a global mixin:
Vue.mixin({
notifications: {
showError: {
title: 'Attention!',
message: 'Error message',
type: 'error',
code: '0'
},
showSuccess: {
title: '',
message: 'Success message',
type: 'success',
backgroundColor: '#f0f3f5',
code: '0'
}
}
})

but browser show warnings (for every component on page):
"VueNotifications: trying to create method which is already exist: showError"
"VueNotifications: trying to create method which is already exist: showSuccess"

How it include in "methods" and which methods I can create (if I can) for global mixin without "notifications"?

[frangte]

@Yorikkk
Have you solved this problem yet?

[Yorikkk]

@frangte
Unfortunately no.
I use it as local mixin and add on every page as I need

[Delari]

how fix this if want create global mixin?