gqlgen: Unwanted Resolver is generated

Question

I'm using gqlgen, and I'd like to add a new method to the Query resolver. The added method looks something like this:

type Query {
...
Foo(bar: Int!): Foo
...
}

The type for Foo is already declared in the file and is being mapped properly to a model in a .go file (I know this because of previous methods that use the type). When I try to generate code from the above addition, a new FooResolver is added to the ResolverRoot.

Any ideas why this is the case?