class Bundler::PubGrub::BasicPackageSource

def parse_dependency(package, dependency)

Bundler::PubGrub::VersionConstraint
Returns: either a Bundler::PubGrub::VersionRange, Bundler::PubGrub::VersionUnion, or a

needed.
Package is passed to this method but for many implementations is not

Convert a (user-defined) dependency into a format Bundler::PubGrub understands.

Override me! 
def parse_dependency(package, dependency)
  raise NotImplementedError
end