code: def _check_delayer_params(tmin, tmax, sfreq):
      """Check delayer input parameters. For future custom delay support."""
      _validate_type(sfreq, "numeric", "`sfreq`")
  
      for tlim in (tmin, tmax):
          _validate_type(tlim, "numeric", "tmin/tmax")
      if not tmin <= tmax:
          raise ValueError("tmin must be <= tmax")
  
imports: import numbers
  import numpy
  from scipy.stats import pearsonr
  from ..fixes import pinv
  from ..utils import _validate_type, fill_doc, verbose
  from .base import BaseEstimator, _check_estimator, get_coef
  from .time_delaying_ridge import TimeDelayingRidge
label_desc: Use image node_id 4 for calling a global function with example usage: _check_delayer_params(tmin, tmax, sfreq) without return types