Function Java_com_dunimd_dmsc_validation_DMSCValidationResult_isValid 

#[unsafe(no_mangle)]
pub extern "system" fn Java_com_dunimd_dmsc_validation_DMSCValidationResult_isValid(
    env: JNIEnv<'_>,
    _class: JClass<'_>,
    ptr: jlong,
) -> jboolean