code: def test_stack_non_linear_scale():
      data = pd.DataFrame(
          {
              "x": "x",
              "value": [0.1, 10, 100, 1000],
              "cat": ["small", "small", "big", "big"],
          }
      )
  
      p = (
          ggplot(data, aes("x", "value", fill="cat"))
          + geom_col()
          + scale_y_log10()
      )
      assert p == "stack-non-linear-scale"
  
imports: import string
  import numpy
  import pandas
  import pytest
  from plotnine import aes, after_stat, geom_bar, geom_boxplot, geom_col, geom_jitter, geom_point, geom_rect, geom_segment, geom_text, ggplot, position_dodge, position_dodge2, position_jitter, position_jitterdodge, position_nudge, position_stack, scale_y_log10, stage
  from plotnine.exceptions import PlotnineError
  from plotnine.positions.position import position
label_desc: Use image node_id 5 for calling a global function with example usage: test_stack_non_linear_scale() without return types