chamilo-lms2/config/packages/sonata_core.yaml

sonata_core:
    form_type: horizontal
    flashmessage:
        success:
            types:
                - {type: my_custom_bundle_success}
                - {type: my_other_bundle_success}
        warning:
            types:
                - {type: my_custom_bundle_warning}
                - {type: my_other_bundle_warning}
        error:
            css_class: danger # optionally, a CSS class can be defined
            types:
                - {type: my_custom_bundle}
        confirmation: # You can add custom types too
            types:
                - {type: custom_bundle_type}
        confirm: # You can add custom types too
            types:
                - {type: custom_bundle_type}
        normal:
            types:
                - {type: custom_bundle_type}
        no_layout: # You can add custom types too
            types:
                - {type: custom_bundle_type}