class PG::CompositeCoder

def inspect
	str = super
	str[-1,0] = " elements_type=#{elements_type.inspect} #{needs_quotation? ? 'needs' : 'no'} quotation"
	str
end

def to_h
	{ **super,
		elements_type: elements_type,
		needs_quotation: needs_quotation?,
		delimiter: delimiter,
	}
end