Dawid Wysakowicz created FLINK-6943:
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Summary: Improve exceptions within
TypeExtractionUtils#getSingleAbstractMethod
Key: FLINK-6943
URL: https://issues.apache.org/jira/browse/FLINK-6943
Project: Flink
Issue Type: Bug
Components: Core
Reporter: Dawid Wysakowicz
Assignee: Dawid Wysakowicz
Exception message seems to be inexact.
Also if there is no SAM, sam would be null upon returning from the method.
The suggestion from a review was to change the message and add a check (for
null sam) prior to returning.
Another suggestion is to check if the given method is an interface, as only for
interface it is possible to pass lambda.
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