Not checked Checkboxes in clientscript are undefined

Not checked Checkboxes in clientscript are undefined

According to the console a checkbox appears in client script as undefined when its not checked. The expected value would be false, no?!
const NotCheckedCheckbox= ZDK.Page.getField("NotCheckedCheckbox").getValue();
log(NotCheckedCheckbox);

console: undefined
if the checkbox is checked the value is true as expected. 
will this issue be solved?