def get_branch_length(self, age=None, pos=<NUM_LIT:0>):
if age is None:<EOL><INDENT>age = self.age<EOL><DEDENT>return self.length * pow(self.branches[pos][<NUM_LIT:0>], age)<EOL>
Get the length of a branch.

        This method calculates the length of a branch in specific age.
        The used formula: length * scale^age.

        Args:
            age (int): The age, for which you want to know the branch length.
        Returns:
            float: The length of the branch