# File lib/faraday/utils.rb, line 157 def build_nested_query(value, prefix = nil) case value when Array value.map { |v| build_nested_query(v, "#{prefix}%5B%5D") }.join("&") when Hash value.map { |k, v| build_nested_query(v, prefix ? "#{prefix}%5B#{escape(k)}%5D" : escape(k)) }.join("&") when NilClass prefix else raise ArgumentError, "value must be a Hash" if prefix.nil? "#{prefix}=#{escape(value)}" end end