contains

Returns true if this SelectionSet includes the provided Field.

The provided field may describe a field on the current GraphQL type, or on a member type if the current type is a union, or on an implementing type if the current type is an interface.

Examples

Given this schema:

interface Node { id: ID! }
type Foo implements Node { id: ID! }

And given these selections on Node:

... on Foo { id }

Then:

• contains(Foo.id) returns true because the selections include an inline fragment on Foo that includes the id field

• contains(Node.id) returns false because the selections do not include a selection on Node.id that is not guarded by a type condition.