com.amazonaws.appsync through error

classpath 'com.amplifyframework:amplify-tools-gradle-plugin:1.0.2'

apply plugin: 'com.android.application'
apply plugin: 'com.amazonaws.appsync'
apply plugin: 'realm-android'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

implementation 'com.amazonaws:aws-android-sdk-appsync:3.1.1'

error: S3ObjectInput is not abstract and does not override abstract method mimeType() in S3InputObjectInterface
public final class S3ObjectInput implements S3InputObjectInterface {
}
methods are not implemented here.

Reproduce the build with the listed Gradle plugins and aws-android-sdk-appsync:3.1.1, then inspect S3ObjectInput against S3InputObjectInterface. Check the relevant generated model and dependency versions to determine the expected compatibility, and confirm that the project compiles without the mimeType() error.

Written by the indexing model from the issue text.