rxMutate

@CheckReturnValue
@ApolloDeprecatedSince(version = ApolloDeprecatedSince.Version.v3_0_0)
inline fun <D : Mutation.Data> ApolloClient.rxMutate(mutation: Mutation<D>, configure: ApolloCall<D>.() -> ApolloCall<D> = { this }): Nothing
@CheckReturnValue
@ApolloDeprecatedSince(version = ApolloDeprecatedSince.Version.v3_0_0)
inline fun <D : Mutation.Data> ApolloClient.rxMutate(mutation: Mutation<D>, withOptimisticUpdates: D, configure: ApolloCall<D>.() -> ApolloCall<D> = { this }): Nothing

Deprecated (with error)

Used for backward compatibility with 2.x

Replace with

mutation(mutation).rxSingle()