Contract form account.analytic.account primary {'required': [('recurring_invoices', '=', True)]}
Contract list account.analytic.account primary Contract search account.analytic.account Contracts account.analytic.account form tree,form {'is_contract':1, 'search_default_not_finished':1, 'search_default_recurring_invoices':1, 'default_recurring_invoices': 1}

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tree form