code: public ListGroupCertificateAuthoritiesResult withGroupCertificateAuthorities(GroupCertificateAuthorityProperties... groupCertificateAuthorities) {
          if (this.groupCertificateAuthorities == null) {
              setGroupCertificateAuthorities(new java.util.ArrayList<GroupCertificateAuthorityProperties>(groupCertificateAuthorities.length));
          }
          for (GroupCertificateAuthorityProperties ele : groupCertificateAuthorities) {
              this.groupCertificateAuthorities.add(ele);
          }
          return this;
      }
docs: A list of certificate authorities associated with the group.
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setGroupCertificateAuthorities(java.util.Collection)} or
  {@link #withGroupCertificateAuthorities(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param groupCertificateAuthorities
  A list of certificate authorities associated with the group.
  @return Returns a reference to this object so that method calls can be chained together.