ID represents GraphQL's "ID" scalar type.

NullBool is a boolean that can be null.

NullFloat is a float that can be null.

NullID is an ID that can be null.

NullInt is an int that can be null.

NullString is a string that can be null.

NullTime is a time value that can be null.

Time is a custom GraphQL type to represent an instant in time.