code: function _is_hash(in_thing){
      var retval = false;
      if( in_thing && us.isObject(in_thing) &&
  	! us.isArray(in_thing) &&
  	! us.isFunction(in_thing) ){
  	retval = true;
      }
      return retval;
  }
docs: / / / 
  Return the best guess (true/false) for whether or not a given
  object is being used as a hash.
  
  @function
  @name module:bbop-core#is_hash
  @param {} in_thing - the thing in question
  @returns {boolean} boolean