Feature Request: Sort multi-line items

VSCode provides Sort Lines Ascending.
However when rust-analyzer's formatting breaks lines, the items cannot be sorted by vscode any longer.
Sorting multi-line items can be only done by rust-analyzer, which understands the AST.

Example:

let a = &[
  MyObject {
    a: 4,
    b: 2,
  },
  MyObject {
    a: 3,
    b: 1,
  },
];

is currently wrongly sorted to

let a = &[
    a: 3,
    a: 4,
    b: 1,
    b: 2,
  },
  },
  MyObject {
  MyObject {
];

The desired result is to swap two MyObjects.

Example2

// sorting should swap these top-level let statements
let b = {
  ..
};
let a = {
  ..
};

Example3

// when line 2~4 are selected, sorting should rearrange them to a,b,c.
let a = My Object {
  c_field: {   // line 2
    ..
  },
  b_field: ..  // line 3
  a_field: ..  // line 4
};

Example4

I haven't thought about desired behavior in more complex cases, like items with different nested fields. scope label, items with different types, etc.

MyObject {
  c_field: ..
  b_field: ..
  ..Default::default()
},
'a: MyObject {
  a_field: ..
  c_field: ..
  ..Default::default()
},
macro_to_generate_MyObejct!(..),
MyObject<TypeParam=..>,

No file or test is named. Start by examining rust-analyzer's existing formatting and sorting support, then clarify how AST items, selections, nested fields, differing types, macros, and generic items should be ordered; done means multi-line selections are rearranged without the corruption shown in the examples.