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How to get addCustomMutation

import addCustomMutation from 'fontoxml-base-flow/src/addCustomMutation.js'

Type: Function

Register a custom mutation, a callback to manipulate the XML of a document directly.


# Name Type Description
1. mutationName String

The name used to refer to this mutation from operations (using a step of type custom-mutation/).

2. callback CustomMutation

The function called to perform the XML mutation.