code: def pinpoint(field_name, options = {})
        options[:field_name] = field_name
  
        if options[:validate]
          Pinpoint::Validations.define(self, options)
        end
  
        Pinpoint::ModelSupport.define_address_accessors(self, options)
      end
docs: Public: Allows fields on a class to be composed/decomposed to
   Pinpoint::Addresses.
  
   field_name - The object to apply the accessors to
   options    - A Hash of options to apply to the method call
  
             :validate   - A Boolean describing whether to include
                           ActiveModel::Validations into the class for the
                           address fields.
             :prefix     - If set, then all fields which make up the Address
                           will be prefixed with that string (eg: #venue_city
                           instead of just #city) If you do not want field
                           names to be prefixed simply set it to false.
                           (defaults to the field name).
  
   Example
  
     # Implicit Prefix (will look for fields such as 'address_city')
     pinpoint :address
  
     # Explicit Prefix (will look for fields such as 'venue_city')
     pinpoint :location, :prefix => :venue
  
     # No Prefix (will look for fields such as 'city')
     pinpoint :location, :prefix => false
  
     # Include field validations
     pinpoint :address, :validate => true
  
   Returns nothing