How i can use JiraCaptchaService in Jira Plugin?

[Alexander]

ComponentAccessor
.getComponentOfType(JiraCaptchaService.class)
.getImageCaptchaService().validateResponseForID(captchaId, value.toUpperCase());

call method  validateResponseForID generate exception java.lang.NoClassDefFoundError: com/octo/captcha/service/image/ImageCaptchaService

but dependency is OK (jira-core provided): 

• com.octo.captcha:jcaptcha:2.0-alpha-1
• com.octo.captcha:jcaptcha-api:2.0-alpha-1

<dependency>
    <groupId>com.atlassian.jira</groupId>
    <artifactId>jira-core</artifactId>
    <version>${jira.version}</version>
    <scope>provided</scope>
</dependency>

[Daniel Eads]

Hey Alexander,

Sorry this question hasn't gotten an answer yet. We do see dropoff in the likelihood that a question gets answered after its first day. Most of the users on the main Community aren't specifically developing P2 plugins so it's tough for someone with expertise to see the right questions!

We have a dedicated Developer Community that might be good to check out for plugin development related questions. Since the topics are more focused, it's easier for other developers to watch the questions coming in and provide guidance.

Sorry for not providing a "real" answer, but hopefully this gets you closer to what you need!

Cheers,
Daniel