# Functions
InsertColumn inserts column c to s at position idx.
NewIntSet creates and initializes a new IntSet.
NewIntSetFromString creates and initializes a new IntSet from indices and ranges in s.
RemoveColumns returns a copy of cols with columns idx removed.
# Structs
AttributeColumnMap maps CSV columns to WFN Attribute fields.
Processor is a CSV processor.
# Type aliases
IntSet is a set of integers.