severity
                         |diagnostic-severity|
      • {current_line}?  (`boolean`, default: `false`) Only show diagnostics
                         for the current line.
      • {format}?        (`fun(diagnostic:vim.Diagnostic): string?`) A
                         function that takes a diagnostic as input and returns
                         a string or nil. If the return value is nil, the
                         diagnostic is not displayed by the handler. Else the
                         output text is used to display the diagnostic.

*vim.diagnostic.Opts.VirtualText*

    Fields: ~
      • {severity}?           (`vim.diagnostic.SeverityFilter`) Only show
                              virtual text for diagnostics matching the given
                              severity |diagnostic-severity|
      • {current_line}?       (`boolean`) Show or hide diagnostics based on
                              the current cursor line. If `true`, only
                              diagnostics on the current cursor line are
                              shown. If `false`, all diagnostics are shown
                              except on the current cursor line. If `nil`, all
                              diagnostics are shown. (default `nil`)
      • {source}?             (`boolean|"if_many"`) Include the diagnostic
                              source in virtual text. Use `'if_many'` to only
                              show sources if there is more than one
                              diagnostic source in the buffer. Otherwise, any
                              truthy value means to always show the diagnostic
                              source.
      • {spacing}?            (`integer`) Amount of empty spaces inserted at
                              the beginning of the virtual text.
      • {prefix}?             (`string|(fun(diagnostic:vim.Diagnostic,i:integer,total:integer): string)`)
                              Prepend diagnostic message with prefix. If a
                              `function`, {i} is the index of the diagnostic
                              being evaluated, and {total} is the total number
                              of diagnostics for the line. This can be used to
                              render diagnostic symbols or error codes.
      • {suffix}?             (`string|(fun(diagnostic:vim.Diagnostic): string)`)
                              Append diagnostic message with suffix. This can
                              be used to render an LSP diagnostic error code.
      • {format}?             (`fun(diagnostic:vim.Diagnostic): string?`) If
                              not nil, the return value is the text used to
                              display the diagnostic. Example: >lua
                                  function(diagnostic)
                                    if diagnostic.severity == vim.diagnostic.severity.ERROR then
                                      return string.format("E: %s", diagnostic.message)
                                    end
                                    return diagnostic.message
                                  end
<

                              If the return value is nil, the diagnostic is
                              not displayed by the handler.
      • {hl_mode}?            (`'replace'|'combine'|'blend'`) See
                              |nvim_buf_set_extmark()|.
      • {virt_text}?          (`[string,any][]`) See |nvim_buf_set_extmark()|.
      • {virt_text_pos}?      (`'eol'|'eol_right_align'|'inline'|'overlay'|'right_align'`)
                              See |nvim_buf_set_extmark()|.
      • {virt_text_win_col}?  (`integer`) See |nvim_buf_set_extmark()|.
      • {virt_text_hide}?     (`boolean`) See |nvim_buf_set_extmark()|.


config({opts}, {namespace})                          *vim.diagnostic.config()*
    Configure diagnostic options globally or for a specific diagnostic
    namespace.

    Configuration can be specified globally, per-namespace,