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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def is_remote_added(remote):
    '''
    Determines if a remote exists.

    Args:
        remote (str): The remote's name.

    Returns:
        bool: True if the remote has already been added.

    CLI Example:

    .. code-block:: bash

        salt '*' flatpak.is_remote_added flathub
    '''
    out = __salt__['cmd.run_all'](FLATPAK_BINARY_NAME + ' remotes')

    lines = out.splitlines()
    for item in lines:
        i = re.split(r'\t+', item.rstrip('\t'))
        if i[0] == remote:
            return True
    return False