Method get_throwable_string

rust/src/api/mod.rs:1539–1552

(
        throwable: jobject,
        jni_env: *mut JNIEnv,
    )

    }

    unsafe fn get_throwable_string(
        throwable: jobject,
        jni_env: *mut JNIEnv,
    ) -> errors::Result<String> {
        let java_string = (opt_to_res(cache::get_jni_call_static_object_method())?)(
            jni_env,
            cache::get_utils_class()?,
            cache::get_utils_exception_to_string_method()?,
            throwable,
        );
        let to_ret = jni_utils::string_from_jobject(java_string, jni_env);
        jni_utils::delete_java_local_ref(jni_env, java_string);
        to_ret
    }

    // Retrieves a JNIEnv in the case that a JVM is already created even from another thread.
    fn get_created_vm() -> Option<*mut JNIEnv> {