"configuration cannot be null");
return this;
}
@NonNull
public Builder setClientId(@NonNull String clientId) {
<BUG>checkArgument(!TextUtils.isEmpty(clientId), "client ID cannot be null or empty");

mClientId = clientId;</BUG>
return this;
}

"configuration cannot be null");
return this;
}
@NonNull
public Builder setClientId(@NonNull String clientId) {
mClientId = checkNotEmpty(clientId, "client ID cannot be null or empty");
return this;
}
