{%- set class = (class ?? [])|explodeClass|push('multiselect') %} {%- set options = options ?? [] %} {%- set values = values ?? [] -%} {%- set hasOptgroups = false -%} {% set containerAttributes = { class: (class ?? [])|explodeClass, }|merge(containerAttributes ?? [], recursive=true) %} {%- if block('attr') is defined %} {%- set containerAttributes = containerAttributes|merge(('