public String getJavaSpecificationVersion() {
    return javaSpecVersion;
  }
The Java specification version, as returned by the {@code java.specification.version} system property.
Examples for valid values are {@code "1.6"} and {@code "1.7"}.

@return the Java specification version, as returned by the {@code java.specification.version} system property
spock-core/src/main/java/spock/util/environment/Jvm.java