client objects are not generated when schema is used

[mores]

Per: https://graphql.org/learn/schema/

if schema.graphql contains:
schema {
query: QueryRoot
}

type QueryRoot @extends {
ticks(first: Int, after: Int, allowCached: Boolean): TicksConnection
}

Then the following files are not generated:
./target/generated-sources/com/test/shopify/generated/client/TicksProjectionRoot.java
./target/generated-sources/com/test/shopify/generated/client/RouteProjection.java
./target/generated-sources/com/test/shopify/generated/client/TicksGraphQLQuery.java
./target/generated-sources/com/test/shopify/generated/client/TickProjection.java
./target/generated-sources/com/test/shopify/generated/client/VotesProjection.java
./target/generated-sources/com/test/shopify/generated/client/TickEdgeProjection.java