class RuboCop::AST::PrismPreparsed

such as in Ruby LSP, the Prism parsing process can be bypassed.
rather than parsing the source code. When the parse result is already available externally,
This class implements the ‘parse_lex` method to return a preparsed `Prism::ParseLexResult`
A `Prism` interface’s class that provides a fixed ‘Prism::ParseLexResult` instead of parsing.

def initialize(prism_result) 

def initialize(prism_result)
  unless prism_result.is_a?(Prism::ParseLexResult)
    raise ArgumentError, <<~MESSAGE
      Expected a `Prism::ParseLexResult` object, but received `#{prism_result.class}`.
    MESSAGE
  end
  @prism_result = prism_result
end

def parse_lex(_source, **_prism_options) 

def parse_lex(_source, **_prism_options)
  @prism_result
end