GraphQL current version: 1.12.9 (2021.05.17)
Schema - executes query.
Query - Read your data.
Mutation - Create, update, delete of your data.
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null, true/false to decide if this field can or cannot be NULL -
methodto decide which method to call onobject.
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required, true/false to decide if this argument is required or optional.
implements coerce_input and coerce_result methods.