class Rubocop::ProcessedSource

It also provides a convenient way to access source lines.
and other information such as disabled lines for cops.
ProcessedSource contains objects which are generated by Parser

def [](*args) 

def [](*args)
  lines[*args]
end

def initialize(buffer, ast, comments, tokens, diagnostics) 

def initialize(buffer, ast, comments, tokens, diagnostics)
  @buffer = buffer
  @ast = ast
  @comments = comments
  @tokens = tokens
  @diagnostics = diagnostics
end

def lines 

def lines
  @lines ||= @buffer.source.split($RS)
end