class RuboCop::AST::Builder

root_node = parser.parse(buffer)
parser = Parser::Ruby25.new(builder)
require ‘parser/ruby25’
builder = RuboCop::AST::Builder.new
buffer.source = ‘puts :foo’
buffer = Parser::Source::Buffer.new(‘(string)’)
@example
generate ASTs with {RuboCop::AST::Node}.
‘RuboCop::AST::Builder` is an AST builder that is utilized to let `Parser`