def METHOD_NAME(self, node):
    """Modifies the ``ast.Call`` node to remove the 'train' prefix from its keywords.
    Args:
        node (ast.Call): a node that represents an estimator constructor.
    Returns:
        ast.AST: the original node, which has been potentially modified.
    """
    for kw in node.keywords:
        if kw.arg in PARAMS:
            kw.arg = kw.arg.replace("train_", "")
    return node