Add a class hierarchy to the class hierarchy cache. This is necessary whenever an S3 class's class hierarchy is important when inferring compatibility between types.

add_class_hierarchy_cache(hierarchy)

Arguments

hierarchy

character the class hierarchy to add; should correspond to the class() of the lowest object in the hierarchy.

Value

NULL

See also

Examples

# This lets mlr3pipelines handle "data.table" as "data.frame". # This is an example and not necessary, because mlr3pipelines adds it by default. add_class_hierarchy_cache(c("data.table", "data.frame"))