Run the latest codeanalyzer on https://github.com/eclipse-store/bookstore-demo and the error is,

java.lang.IllegalStateException: Duplicate key requireNonEmpty(T, Supplier) (attempted merging values Callable(signature=requireNonEmpty(T, Supplier), comment=/** * Checks that the specified char sequence is not {@code null} or empty and throws a customized * {@link NullPointerException} respectively {@link IllegalArgumentException} if it is. * * @param <T> * @param charSequence the char sequence to check * @param messageSupplier supplier of the detail message to be * used in the event that a exception is thrown * @return {@code charSequence} if not {@code null} or empty * @throws NullPointerException if {@code charSequence} is {@code null} * @throws IllegalArgumentException if {@code charSequence} is empty */, annotations=[], modifiers=[public, static], thrownExceptions=[], declaration=public static T requireNonEmpty(final T charSequence, final Supplier<String> messageSupplier), parameters=[ParameterInCallable(type=T, name=charSequence, annotations=[], modifiers=[final]), ParameterInCallable(type=java.util.function.Supplier<java.lang.String>, name=messageSupplier, annotations=[], modifiers=[final])], code={ if (charSequence == null) { throw new NullPointerException(messageSupplier.get()); } if (charSequence.length() == 0) { throw new IllegalArgumentException(messageSupplier.get()); } return charSequence; }, startLine=38, endLine=52, returnType=T, isImplicit=false, isConstructor=false, referencedTypes=[], accessedFields=[], callSites=[CallSite(methodName=get, receiverExpr=messageSupplier, receiverType=java.util.function.Supplier<java.lang.String>, argumentTypes=[], returnType=java.lang.String, calleeSignature=get(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=45, startColumn=35, endLine=45, endColumn=55), CallSite(methodName=length, receiverExpr=charSequence, receiverType=, argumentTypes=[], returnType=, calleeSignature=length(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=47, startColumn=6, endLine=47, endColumn=26), CallSite(methodName=get, receiverExpr=messageSupplier, receiverType=java.util.function.Supplier<java.lang.String>, argumentTypes=[], returnType=java.lang.String, calleeSignature=get(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=49, startColumn=39, endLine=49, endColumn=59), CallSite(methodName=<init>, receiverExpr=, receiverType=java.lang.NullPointerException, argumentTypes=[java.lang.String], returnType=java.lang.NullPointerException, calleeSignature=NullPointerException(java.lang.String), isPublic=false, isProtected=false, isPrivate=false, isUnspecified=true, isStaticCall=false, isConstructorCall=true, startLine=45, startColumn=10, endLine=45, endColumn=56), CallSite(methodName=<init>, receiverExpr=, receiverType=java.lang.IllegalArgumentException, argumentTypes=[java.lang.String], returnType=java.lang.IllegalArgumentException, calleeSignature=IllegalArgumentException(java.lang.String), isPublic=false, isProtected=false, isPrivate=false, isUnspecified=true, isStaticCall=false, isConstructorCall=true, startLine=49, startColumn=10, endLine=49, endColumn=60)], variableDeclarations=[], cyclomaticComplexity=0) and Callable(signature=requireNonEmpty(T, Supplier), comment=/** * Checks that the specified collection is not {@code null} or empty and throws a customized * {@link NullPointerException} respectively {@link IllegalArgumentException} if it is. * * @param <T> * @param collection the collection to check * @param messageSupplier supplier of the detail message to be * used in the event that a exception is thrown * @return {@code collection} if not {@code null} or empty * @throws NullPointerException if {@code collection} is {@code null} * @throws IllegalArgumentException if {@code collection} is empty */, annotations=[], modifiers=[public, static], thrownExceptions=[], declaration=public static T requireNonEmpty(final T collection, final Supplier<String> messageSupplier), parameters=[ParameterInCallable(type=T, name=collection, annotations=[], modifiers=[final]), ParameterInCallable(type=java.util.function.Supplier<java.lang.String>, name=messageSupplier, annotations=[], modifiers=[final])], code={ if (collection == null) { throw new NullPointerException(messageSupplier.get()); } if (collection.isEmpty()) { throw new IllegalArgumentException(messageSupplier.get()); } return collection; }, startLine=94, endLine=108, returnType=T, isImplicit=false, isConstructor=false, referencedTypes=[], accessedFields=[], callSites=[CallSite(methodName=get, receiverExpr=messageSupplier, receiverType=java.util.function.Supplier<java.lang.String>, argumentTypes=[], returnType=java.lang.String, calleeSignature=get(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=101, startColumn=35, endLine=101, endColumn=55), CallSite(methodName=isEmpty, receiverExpr=collection, receiverType=, argumentTypes=[], returnType=, calleeSignature=isEmpty(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=103, startColumn=6, endLine=103, endColumn=25), CallSite(methodName=get, receiverExpr=messageSupplier, receiverType=java.util.function.Supplier<java.lang.String>, argumentTypes=[], returnType=java.lang.String, calleeSignature=get(), isPublic=true, isProtected=false, isPrivate=false, isUnspecified=false, isStaticCall=false, isConstructorCall=false, startLine=105, startColumn=39, endLine=105, endColumn=59), CallSite(methodName=<init>, receiverExpr=, receiverType=java.lang.NullPointerException, argumentTypes=[java.lang.String], returnType=java.lang.NullPointerException, calleeSignature=NullPointerException(java.lang.String), isPublic=false, isProtected=false, isPrivate=false, isUnspecified=true, isStaticCall=false, isConstructorCall=true, startLine=101, startColumn=10, endLine=101, endColumn=56), CallSite(methodName=<init>, receiverExpr=, receiverType=java.lang.IllegalArgumentException, argumentTypes=[java.lang.String], returnType=java.lang.IllegalArgumentException, calleeSignature=IllegalArgumentException(java.lang.String), isPublic=false, isProtected=false, isPrivate=false, isUnspecified=true, isStaticCall=false, isConstructorCall=true, startLine=105, startColumn=10, endLine=105, endColumn=60)], variableDeclarations=[], cyclomaticComplexity=0))