This is my block of code that opens the dialog box:

const resModel = field.relation; 
this .addDialog(SelectCreateDialog, { 
    title: sprintf( this .env._t( "Select: %s" ) ), field.string), 
    noCreate: true , 
    multiSelect: true , 
    resModel: resModel, 
    context: field.context || { }, 
    onSelected: async (resIds) => { 
        console.log( "************onSelected**********" ); 
        const data = await this .fetchData( resModel,[[ "id" , "in" , resIds]]); 
        if (!data.length) { 
            condition.
            condition.displayedValue = "" ; 
            return ; 
        } 
        // replace comma with ¶ to avoid split errors (in case of comma in display_name) 
        condition.value = field.type == "one2many" || field.type == "many2many" ? data.map(d => d.id).join( "," ) : data.map(d => d.display_name.replace( "," , "¶" )).join( "," ); 
        condition.displayedValue = data.map(d => ` "${d.display_name}" `).join( "," ); 
        // click on apply to trigger the onApply() 
        $( ".

    }, 
    { 
        onClose: () => { 
            console.log( "************onClose**********" ); 
        }, 
    } 
);

I would appreciate any help!