# File activesupport/lib/active_support/callbacks.rb, line 80
80:       def self.build(kind, *methods, &block)
81:         methods, options = extract_options(*methods, &block)
82:         methods.map! { |method| Callback.new(kind, method, options) }
83:         new(methods)
84:       end

     # File activesupport/lib/active_support/callbacks.rb, line 113
113:       def delete(callback)
114:         super(callback.is_a?(Callback) ? callback : find(callback))
115:       end

     # File activesupport/lib/active_support/callbacks.rb, line 109
109:       def find(callback, &block)
110:         select { |c| c == callback && (!block_given? || yield(c)) }.first
111:       end

     # File activesupport/lib/active_support/callbacks.rb, line 100
100:       def replace_or_append!(chain)
101:         if index = index(chain)
102:           self[index] = chain
103:         else
104:           self << chain
105:         end
106:         self
107:       end

    # File activesupport/lib/active_support/callbacks.rb, line 86
86:       def run(object, options = {}, &terminator)
87:         enumerator = options[:enumerator] || :each
88: 
89:         unless block_given?
90:           send(enumerator) { |callback| callback.call(object) }
91:         else
92:           send(enumerator) do |callback|
93:             result = callback.call(object)
94:             break result if terminator.call(result, object)
95:           end
96:         end
97:       end