How to replace "<space>" with "\\<space>" in groovy

Tried with

def resultString="Hello word result Hello: 0 Word: 0 void: 0"
def resultString1=resultString.replaceAll(' ', '\\\\ ')
println resultString1

Expected Result:

Hello\\ word\\ result\\ Hello:\\ 0\\ Word:\\ 0\\ void:\\ 0

Actual Getting:

Hello\ word\ result\ Hello:\ 0\ Word:\ 0\ void:\ 0

Any input will be very useful

>Solution :

def resultString="Hello word result Hello: 0 Word: 0 void: 0" println(resultString.replaceAll("\\s","\\\\\\\\"))