sanitizeFieldName function

String sanitizeFieldName(
  1. String key
)

Implementation

String sanitizeFieldName(String key) {
  // Keep original JSON key for mapping; field name must be a valid identifier.
  if (isValidDartIdentifier(key)) return key;
  // Replace invalid chars with underscores, and prefix if starts with digit.
  var s = key.replaceAll(RegExp(r'[^A-Za-z0-9_]'), '');
  // if (!RegExp(r'^[A-Za-z_]').hasMatch(s)) s = '$s';
  return s;
}