code: public GetInvitationConfigurationResult withPrivateSkillIds(String... privateSkillIds) {
          if (this.privateSkillIds == null) {
              setPrivateSkillIds(new java.util.ArrayList<String>(privateSkillIds.length));
          }
          for (String ele : privateSkillIds) {
              this.privateSkillIds.add(ele);
          }
          return this;
      }
docs: <p>
  The list of private skill IDs that you want to recommend to the user to enable in the invitation.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPrivateSkillIds(java.util.Collection)} or {@link #withPrivateSkillIds(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param privateSkillIds
  The list of private skill IDs that you want to recommend to the user to enable in the invitation.
  @return Returns a reference to this object so that method calls can be chained together.