code: function(i, query) {
      if(query.substr(i,this.ATOM_BOOLEAN_TRUE.length) == this.ATOM_BOOLEAN_TRUE) return [i+this.ATOM_BOOLEAN_TRUE.length, new this(true)];
      else if(query.substr(i,this.ATOM_BOOLEAN_FALSE.length) == this.ATOM_BOOLEAN_FALSE) return [i+this.ATOM_BOOLEAN_FALSE.length, new this(false)];
      else return null;
    }
docs: SpahQL.Token.Boolean.parseAt(i, query) -> Array\[resumeIndex, foundToken\] or null
  
  Identifies a boolean true or false at the given index in the given string query and returns null
  if no token is identified, or a tuple of terminating index and the instantiated token if successful.