code: public void setPrivateSkillIds(java.util.Collection<String> privateSkillIds) {
          if (privateSkillIds == null) {
              this.privateSkillIds = null;
              return;
          }
  
          this.privateSkillIds = new java.util.ArrayList<String>(privateSkillIds);
      }
docs: <p>
  The list of private skill IDs that you want to recommend to the user to enable in the invitation.
  </p>
  
  @param privateSkillIds
  The list of private skill IDs that you want to recommend to the user to enable in the invitation.