class Module


Core extension library
#####################################################################

def rake_extension(method)


end
end
end
...
def xyz
rake_extension("xyz") do
class String

Usage:

block will take effect.
not added. Otherwise the block is yielded and any definitions in the
the method already exists, then a warning is printed and the extension is
Check for an existing method in the current class before extending. IF 
def rake_extension(method)
  if method_defined?(method)
    $stderr.puts "WARNING: Possible conflict with Rake extension: #{self}##{method} already exists"
  else
    yield
  end
end