FUNCTION dustem_get_wavelengths,bidon,help=help,isrf_wavelengths=isrf_wavelengths

;+
; NAME:
;    dustem_get_wavelengths
;
; PURPOSE:
;    returns the wavelengths used for dustemwrap spectra. (Are they the same for emission and extinction ?)
;
; CATEGORY:
;    DUSTEM Wrapper
;
; CALLING SEQUENCE:
;    wavelengths=dustem_get_wavelengths([/help][,isrf_wavelengths=])
;
; INPUTS:
;    None
;
; OPTIONAL INPUT PARAMETERS:
;    None
;
; OUTPUTS:
;    wavelengths = set of Spectra wavelengths used by dustemwrap[mic]
;
; OPTIONAL OUTPUT PARAMETERS:
;    isrf_wavelengths = set of ISRF wavelengths used by dustemwrap [mic]
;
; ACCEPTED KEY-WORDS:
;    help                  = if set, print this help
;
; COMMON BLOCKS:
;    None
;
; SIDE EFFECTS:
;    None
;
; RESTRICTIONS:
;    None
;
; PROCEDURE:
;    
;
; EXAMPLES
;
; MODIFICATION HISTORY:
;    Written by JPB 
;    Evolution details on the DustEMWrap gitlab.
;    See http://dustemwrap.irap.omp.eu/ for FAQ and help.  
;-

IF keyword_set(help) THEN BEGIN
  doc_library,'dustem_get_wavelengths'
  lambir=0.
  goto,the_end
ENDIF

IF !dustem_which EQ 'DESERT' THEN BEGIN
  lambir=((*!dustem_params).gemissiv.lambir)
ENDIF ELSE BEGIN
  lambir=((*!dustem_params).lambda.lambda) 
ENDELSE

isrf_wavelengths=(*!dustem_params).ISRF.lambisrf

the_end:
RETURN,lambir

END