DataType class
$ToString(): String representation of the DataType
$Equals(other): Is the DataType equal to other
$fields(): The children fields associated with this type
$code(namespace): Produces an R call of the data type. Use namespace=TRUE to call with arrow::.
There are also some active bindings:
$id: integer Arrow type id.
$name: string Arrow type name.
$num_fields: number of child fields.