How to get a functions keyword argument types?

General Usage
1

How can I get the types for the keyword arguments of a function? For example, with normal arguments I can use

f(x::Int) = x
methods(f)[1].sig
#Tuple{typeof(f), Int64}

I’m looking for something along the lines of

g(x::Int; y= 10 ) = x + y
magical_function(g) 
# (y = Int64,)
2

I figured something out

using CodeTracking, ExprManipulation, ExprTools
using Base.Meta

function fn_expr(fn)
	ms = methods(fn)
	m = ms[1]
	types = tuple(m.sig.types[2:end]...)
	Meta.parse(code_string(fn, types))
end

function fn_kwargs(fn)
	expr = fn_expr(fn)
	def = splitdef(expr)
	d = Dict()
	m_expr = MExpr(:kw, Capture(:var), Capture(:expr))
	for i in def[:kwargs]
		m = match(m_expr, i)
		d[m.var] = eval(m.expr)
	end
	d
end