code: def j1(ctx, x):
      """Computes the Bessel function `J_1(x)`.  See :func:`~mpmath.besselj`."""
      return ctx.besselj(1, x)
  
imports: from .functions import defun, defun_wrapped
label_desc: Use image node_id 2 for calling a global function with example usage: j1(ctx, x) and returns: ctx