Variable BUILT_IN_LAYOUT_NAMES`Const`

BUILT_IN_LAYOUT_NAMES: readonly [
    "default",
    "cover",
    "section",
    "two-column",
    "image-full",
    "image-left",
    "image-right",
    "code",
    "quote",
    "statement",
] = ...

Built-in slide layout names. Plugin-contributed layouts may also be used (validated at runtime).