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https://issues.apache.org/jira/browse/FLINK-3118?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15066598#comment-15066598
 ] 

ASF GitHub Bot commented on FLINK-3118:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1471#discussion_r48158234
  
    --- Diff: 
flink-java/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java 
---
    @@ -340,6 +340,15 @@ protected TypeExtractor() {
                }
                return ti;
        }
    +
    +   @SuppressWarnings("unchecked")
    +   public static <OUT> TypeInformation<OUT> createTypeInfo(Class<?> 
baseClass, Class<?> clazz, int returnParamPos, Object instance) {
    --- End diff --
    
    Missing java docs


> Check if MessageFunction implements ResultTypeQueryable
> -------------------------------------------------------
>
>                 Key: FLINK-3118
>                 URL: https://issues.apache.org/jira/browse/FLINK-3118
>             Project: Flink
>          Issue Type: Bug
>          Components: Gelly
>            Reporter: Martin Junghanns
>            Assignee: Martin Junghanns
>
> To generalize message values in vertex centric computations, it is necessary 
> to let the user define the {{TypeInformation}} via {{ResultTypeQueryable}}. 
> This needs to be checked in {{VertexCentricIteration}}.



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