Function putMove [src]
Same as put but the key and value become owned by the EnvMap rather
than being copied.
If putMove fails, the ownership of key and value does not transfer.
On Windows key must be a valid WTF-8 string.
  Prototype
 pub fn putMove(self: *EnvMap, key: []u8, value: []u8) !void  Parameters
self: *EnvMapkey: []u8value: []u8 Source
 pub fn putMove(self: *EnvMap, key: []u8, value: []u8) !void {
    assert(unicode.wtf8ValidateSlice(key));
    const get_or_put = try self.hash_map.getOrPut(key);
    if (get_or_put.found_existing) {
        self.free(get_or_put.key_ptr.*);
        self.free(get_or_put.value_ptr.*);
        get_or_put.key_ptr.* = key;
    }
    get_or_put.value_ptr.* = value;
}