class Ivar::MethodTargetedInstanceVariableReferenceVisitor

Visitor that collects instance variable references within a specific method definition

def initialize(file_path, target_method_name, target_line) 

def initialize(file_path, target_method_name, target_line)
  super()
  @file_path = file_path
  @target_method_name = target_method_name
  @target_line = target_line
  @references = []
  @in_target_method = false
end

def visit_def_node(node)

Only visit the method definition we're targeting 
def visit_def_node(node)
  # Check if this is our target method
  if node.name.to_sym == @target_method_name && node.location.start_line == @target_line
    # Found our target method, now collect all instance variable references within it
    collector = IvarCollector.new(@file_path, @target_method_name)
    node.body&.accept(collector)
    @references = collector.references
    false
  else
    # Sometimes methods are found inside other methods...
    node.body&.accept(self)
    true
  end
end