code: public PutMailboxPermissionsRequest withPermissionValues(String... permissionValues) {
          if (this.permissionValues == null) {
              setPermissionValues(new java.util.ArrayList<String>(permissionValues.length));
          }
          for (String ele : permissionValues) {
              this.permissionValues.add(ele);
          }
          return this;
      }
docs: <p>
  The permissions granted to the grantee. SEND_AS allows the grantee to send email as the owner of the mailbox (the
  grantee is not mentioned on these emails). SEND_ON_BEHALF allows the grantee to send email on behalf of the owner
  of the mailbox (the grantee is not mentioned as the physical sender of these emails). FULL_ACCESS allows the
  grantee full access to the mailbox, irrespective of other folder-level permissions set on the mailbox.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPermissionValues(java.util.Collection)} or {@link #withPermissionValues(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param permissionValues
  The permissions granted to the grantee. SEND_AS allows the grantee to send email as the owner of the
  mailbox (the grantee is not mentioned on these emails). SEND_ON_BEHALF allows the grantee to send email on
  behalf of the owner of the mailbox (the grantee is not mentioned as the physical sender of these emails).
  FULL_ACCESS allows the grantee full access to the mailbox, irrespective of other folder-level permissions
  set on the mailbox.
  @return Returns a reference to this object so that method calls can be chained together.
  @see PermissionType