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 Backend service to convert an input shacl shape into JSON form for the frontend service.
 - Input is expected to be a MultipartFile file.
 - Output object is ShaclModel.java. It consists of a list of json objects for prefixes in the input file and another list of json objects for the shapes listed in the input file.
+- Alternatively input can be two MultipartFiles (one .ttl SHACL Shape, one .json Claim-File), behaviour is the same, but the answer would be a ResponseShaclJsonPair.java, which consists out of a ShaclModel.java and a Map of Strings containing overlapping attributes. This would be done such that the Frontend can prefill the displayed FormFields.
 - Each shape is depicted in VicShape.java. Shape name is stored in variable schema. Properties of the shape are stored in variable called 'constraints' which is of type ShapeProperties.java.
 - Test instances can be found under src/test/resources.
 - JUnit test cases can be found under src/test/java.