gnome-shell/data/dbus-interfaces/org.freedesktop.impl.portal.PermissionStore.xml

<node>
  <interface name="org.freedesktop.impl.portal.PermissionStore">
    <method name="Lookup">
      <arg name="table" type="s" direction="in"/>
      <arg name="id" type="s" direction="in"/>
      <arg name="permissions" type="a{sas}" direction="out"/>
      <arg name="data" type="v" direction="out"/>
    </method>
    <method name="Set">
      <arg name="table" type="s" direction="in"/>
      <arg name="create" type="b" direction="in"/>
      <arg name="id" type="s" direction="in"/>
      <arg name="app_permissions" type="a{sas}" direction="in"/>
      <arg name="data" type="v" direction="in"/>
    </method>
    <method name="SetPermission">
      <arg name='table' type='s' direction='in'/>
      <arg name='create' type='b' direction='in'/>
      <arg name='id' type='s' direction='in'/>
      <arg name='app' type='s' direction='in'/>
      <arg name='permissions' type='as' direction='in'/>
    </method>
    <signal name="Changed">
      <arg name="table" type="s" direction="out"/>
      <arg name="id" type="s" direction="out"/>
      <arg name="deleted" type="b" direction="out"/>
      <arg name="data" type="v" direction="out"/>
      <arg name="permissions" type="a{sas}" direction="out"/>
    </signal>
  </interface>
</node>