Null boolean parameter is coerced to false when Java type is primitive boolean

[vojtapol]

mutation  {
  createCat(enabled: Boolean): Cat! 
}

public Cat createCat(boolean enabled) {
   ...
}

when executing:

mutation {
  createCat {
    id
   }
}

The value of enabled gets coerced to false. Instead, this should throw and require a nullable Boolean type to be used instead. Preferably it should throw at startup.