WorkingDaysManager in JIRA Server 7.3.0

There are some functionalities from Greenhopper that I need for my plugin. Seems that JIRA Software is Greenhopper now. I saw the documentation of what I need in JIRA Software, the WorkingDaysManager https://docs.atlassian.com/jira-software/6.7.12/

However, I am developping for JIRA Server 7.3.0. Is there a way to using those APIs?