library/library_checkout/views/checkout_view.xml

<?xml version="1.0" ?>
<odoo>
    <act_window id="action_other_checkouts_button"
                name="Open Other Checkouts"
                res_model="library.checkout"
                view_mode="tree,form"
                domain="[('member_id','=',default_member_id),
                    ('state', 'in', ['open']),
                    ('id','!=',active_id)]"
    />
    <record id="view_tree_checkout" model="ir.ui.view">
        <field name="name">Checkout Tree</field>
        <field name="model">library.checkout</field>
        <field name="arch" type="xml">
            <tree>
                <field name="request_date"/>
                <field name="member_id"/>
            </tree>
        </field>
    </record>
    <record id="view_form_checkout" model="ir.ui.view">
        <field name="name">Checkout Form</field>
        <field name="model">library.checkout</field>
        <field name="arch" type="xml">
            <form>
                <header>
                    <field name="stage_id" widget="statusbar" clickable="True" options="{'fold_field':'fold'}"/>
                </header>
                <sheet>
                    <div name="button_box" class="oe_button_box">
                        <button class="oe_stat_button"
                                icon="fa-tasks"
                                help="Other checkouts pending return"
                                type="action"
                                name="%(action_other_checkouts_button)d"
                                context="{'default_member_id': member_id}">
                            <field string="To Return"
                                   name="num_other_checkouts"
                                   widget="statinfo"
                            />
                        </button>
                    </div>
                    <field name="kanban_state" widget="state_selection"/>
                    <div class="oe_title">
                        <field name='priority' widget='priority' />
                        <h1>Library Checkout</h1>
                    </div>
                    <group>
                        <field name="member_id"/>
                        <field name="request_date"/>
                        <field name="user_id"/>
                        <notebook>
                            <page string="Borrowed Books" name="page_lines">
                                <field name="line_ids">
                                    <field name="name"/>
                                </field>
                            </page>
                        </notebook>
                    </group>
                </sheet>
                <div class="oe_chatter">
                    <field name="message_follower_ids" widget="mail_followers"/>
                    <field name="activity_ids" widget="mail_activity"/>
                    <field name="message_ids" widget="mail_thread"/>
                </div>
            </form>
        </field>
    </record>
</odoo>