class Dentaku::DependencyResolver

def initialize(vars_to_dependencies_hash)
  @key_mapping = Hash[vars_to_dependencies_hash.keys.map { |k| [k.downcase, k] }]
  # ensure variables are normalized strings
  @vars_to_deps = Hash[vars_to_dependencies_hash.map { |k, v| [k.downcase.to_s, v] }]
end