pub fn joinString(p: Path, gpa: Allocator, sub_path: []const u8) Allocator.Error![]u8
pub fn joinString(p: Path, gpa: Allocator, sub_path: []const u8) Allocator.Error![]u8 { const parts: []const []const u8 = if (p.sub_path.len == 0) &.{sub_path} else &.{ p.sub_path, sub_path }; return p.root_dir.join(gpa, parts); }