code: def deprecated_precision(*args):
      warnings.warn(
          "The --precision option is unused, deprecated, and will be removed in 2.0.0.",
          RasterioDeprecationWarning,
      )
      return None
  
file_path: rasterio/rasterio/rio/merge.py
imports: import warnings
  import click
  from rasterio.enums import Resampling
  from rasterio.errors import RasterioDeprecationWarning
  from rasterio.rio import options
  from rasterio.rio.helpers import resolve_inout
  from rasterio.merge import MERGE_METHODS
label_desc: Use image node_id 1 for calling a global function with example usage: deprecated_precision() and returns: None