code: def backend_show(show):
      """Set default behaviour for show if not explicitly defined."""
      if show is None:
          show = rcParams["plot.matplotlib.show"]
      return show
  
imports: import matplotlib
  from matplotlib.cbook import normalize_kwargs
  from matplotlib.pyplot import subplots
  from numpy import ndenumerate
  from ....rcparams import rcParams
  from .autocorrplot import plot_autocorr
  from .bpvplot import plot_bpv
  from .compareplot import plot_compare
  from .densityplot import plot_density
  from .distplot import plot_dist
  from .elpdplot import plot_elpd
  from .energyplot import plot_energy
  from .essplot import plot_ess
  from .forestplot import plot_forest
  from .hdiplot import plot_hdi
  from .kdeplot import plot_kde
  from .khatplot import plot_khat
  from .loopitplot import plot_loo_pit
  from .mcseplot import plot_mcse
  from .pairplot import plot_pair
  from .parallelplot import plot_parallel
  from .posteriorplot import plot_posterior
  from .ppcplot import plot_ppc
  from .rankplot import plot_rank
  from .traceplot import plot_trace
  from .violinplot import plot_violin
label_desc: Use image node_id 2 for calling a global function with example usage: backend_show(show) and returns: show