The following methods in the internal Utils class appear to be unused and should be investigated.

compareCaseCompare
excludeDeprecatedMembers
getAnnotationTypes
getBlockTags(javax.lang.model.element.Element,com.sun.source.doctree.DocTree$Kind,com.sun.source.doctree.DocTree$Kind)
getEnums
getIllegalArgumentExceptionType
getInterfaces
getNullPointerExceptionType
getOrdinalValue
getRecords
getTopMostContainingTypeElement
isAnnotated
isAttribute
isAuthor
isComment
isDeprecated
isDocComment
isDocRoot
isEndElement
isEntity
ieEnumConstant
isErroneous
isErrorType
isException
isIdentifier
isInheritDoc
isIntersectionType
isLink
isLinkPlain
isLiteral
isOther
isParam
isPrimitive
isReference
isReturn
isSee
isSerial
isSerialData
isSerialField
isSince
isThrows
isUnknownBlockTag
isUnknownInlineTag
isVersion
isWildcard
overriddenClass
quote