nvim-treesitter/runtime/queries/corn/indents.scm

[
  (assign_block
    "{")
  (object)
  (array)
] @indent.begin

(assign_block
  "}" @indent.branch)

(assign_block
  "}" @indent.end)

(object
  "}" @indent.branch)

(object
  "}" @indent.end)

(array
  "]" @indent.branch)

(array
  "]" @indent.end)