feat: Implement support for @_optional
and @_required
on fields
#32
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Resolves #30
Summary
This supports client-controlled nullability directives, as implemented for instance in in Graphcache for an example.
When applied,
@_optional
/@optional
turns a non-nullable field into a nullable one.@_required
/@required
turns a nullable field into a non-nullable one.Set of changes
getTypeDirective
asunwrapType
input and override type as required