Function textget

pub(crate) fn textget<'ob>(
    plist: Gc<ObjectType<'ob>>,
    prop: Gc<ObjectType<'ob>>,
) -> Result<Gc<ObjectType<'ob>>>

Get the value of property prop from plist, which is the plist of an interval. We check for direct properties, for categories with property prop, and for prop appearing on the default-text-properties list.