Base class for operations. An operation is any object that responds to `#call` receiving a hash of options including:
`:resource` - The resource object the operation is invoked against.
`:args` - An array of arguments given by the caller
`:block` - An optional block argument
@return [Source, nil]
# File lib/aws-sdk-resources/operations.rb, line 16 def initialize(options = {}) @source = options[:source] end