code: public boolean containsLocalVariable(@Nullable final String name) {
      if (name == null) {
        return false;
      }
  
      final String normalized = assertNotNull(PreprocessorUtils.normalizeVariableName(name));
  
      if (normalized.isEmpty()) {
        return false;
      }
  
      return localVarTable.containsKey(normalized);
    }
docs: Check that a local variable for a name is presented
  
  @param name the checking name, it will be normalized to the support format and can be null
  @return false either if the name is null or there is not any local variable for the name, otherwise true