Rename method and hash for arg keys/values

lib/ruby_lsp/ruby_lsp_rails/completion.rb

@@ -45,16 +45,16 @@ def handle_active_record_where_completions(node)
         return if resolved_class.nil?
 
         arguments = T.must(@node_context.call_node).arguments&.arguments
-        existing_args = T.let({}, T::Hash[String, T::Boolean])
+        indexed_call_node_args = T.let({}, T::Hash[String, T::Boolean])
 
         if arguments&.is_a?(Array)
-          existing_args = get_call_node_arguments(arguments: arguments)
-          return if existing_args.values.any? { |v| v == node }
+          indexed_call_node_args = index_call_node_args(arguments: arguments)
+          return if indexed_call_node_args.values.any? { |v| v == node }
         end
 
         resolved_class[:columns].each do |column|
           next unless column[0].start_with?(node.name.to_s)
-          next if existing_args.key?(column[0])
+          next if indexed_call_node_args.key?(column[0])
 
           @response_builder << Interface::CompletionItem.new(
             label: column[0],
@@ -69,8 +69,8 @@ def handle_active_record_where_completions(node)
       end
 
       sig { params(arguments: T::Array[Prism::Node]).returns(T::Hash[String, T::Boolean]) }
-      def get_call_node_arguments(arguments:)
-        existing_args = {}
+      def index_call_node_args(arguments:)
+        indexed_call_node_args = {}
         arguments.each do |argument|
           next unless argument.is_a?(Prism::KeywordHashNode)
 
@@ -79,11 +79,11 @@ def get_call_node_arguments(arguments:)
 
             key = e.key
             if key.is_a?(Prism::SymbolNode)
-              existing_args[key.value] = e.value
+              indexed_call_node_args[key.value] = e.value
             end
           end
         end
-        existing_args
+        indexed_call_node_args
       end
     end
   end