title: "Receiver class does not define or inherit an implementation" with RestAssured 4.3.0
body: <p>When running the following <code>WebTestClient</code> test </p>
  
  <pre><code>    @Test
      fun `test accepted response`() {
          standaloneSetup(SapKontraktEndpointV1())
  
          given()
              .body(
                  "{}", ObjectMapperType.JACKSON_2
              )
              .contentType(ContentType.JSON)
          .`when`()
              .post("/api/v1/kontrakt/erstellen")
          .then()
              .statusCode(202)
      }
  </code></pre>
  
  <p>Then the following error occurs:</p>
  
  <pre><code>java.lang.AbstractMethodError: Receiver class io.restassured.internal.mapping.ObjectMapperSerializationContextImpl does not define or inherit an implementation of the resolved method 'abstract void setProperty(java.lang.String, java.lang.Object)' of interface groovy.lang.GroovyObject.
  
      at org.codehaus.groovy.runtime.InvokerHelper.setProperty(InvokerHelper.java:213)
      at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setProperty(ScriptBytecodeAdapter.java:496)
      at io.restassured.internal.mapping.ObjectMapping.serializationContext(ObjectMapping.groovy:275)
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.base/java.lang.reflect.Method.invoke(Method.java:564)
      at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:101)
      at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite$StaticMetaMethodSiteNoUnwrapNoCoerce.invoke(StaticMetaMethodSite.java:149)
      at org.codehaus.groovy.runtime.callsite.StaticMetaMethodSite.callStatic(StaticMetaMethodSite.java:100)
      at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:55)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:196)
      at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:224)
      at io.restassured.internal.mapping.ObjectMapping.serialize(ObjectMapping.groovy:123)
      at io.restassured.module.webtestclient.internal.WebTestClientRequestSpecificationImpl.body(WebTestClientRequestSpecificationImpl.java:357)
  </code></pre>
  
  <p>With 4.2.0 the test run is successful.</p>