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java.lang.IllegalArgumentException: Name required	at org.springframework.roo.support.util.Assert.notNull(Assert.java:112)	at org.springframework.roo.classpath.details.DefaultClassOrInterfaceTypeDetails.(DefaultClassOrInterfaceTypeDetails.java:80)	at org.springframework.roo.classpath.details.ClassOrInterfaceTypeDetailsBuilder.build(ClassOrInterfaceTypeDetailsBuilder.java:140)	at org.springframework.roo.addon.email.MailOperationsImpl.injectEmailTemplate(MailOperationsImpl.java:259)