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java.lang.NullPointerException: null	at org.kuali.rice.krad.data.metadata.impl.DataObjectAttributeImpl.toString(DataObjectAttributeImpl.java:162)	at java.lang.String.valueOf(String.java:2826)	at java.lang.StringBuilder.append(StringBuilder.java:115)	at java.util.AbstractCollection.toString(AbstractCollection.java:422)	at java.util.Collections$UnmodifiableCollection.toString(Collections.java:1001)	at java.lang.String.valueOf(String.java:2826)	at java.lang.StringBuilder.append(StringBuilder.java:115)	at org.kuali.rice.krad.data.metadata.impl.DataObjectMetadataImpl.toString(DataObjectMetadataImpl.java:477)	at java.lang.String.valueOf(String.java:2826)	at java.io.PrintStream.println(PrintStream.java:771)	at org.kuali.rice.krad.data.jpa.JpaMetadataProviderTest.testGetMetadataForClass_ClassData(JpaMetadataProviderTest.java:80)