human
Solve the following python programming problem given the following code:
def _validate_template(node, lexer) : 
    ' Validate the correctness of names in a template definitions.

    This function ensures that parameters, const expressions, and
    identifiers do not shadow one another.

    ' 
    param_names = set () 
    const_names = set () 
    ident_names = set () 
    def check_const(name, node) : 
        msg = None 
        if (name in param_names) : 
            msg = "declaration of 'const %s' shadows a parameter" 
else : 
            if (name in const_names) : 
                msg = "redeclaration of 'const %s'" 
if (msg is not None) : 
            syntax_error ((msg % name), FakeToken (lexer, node.lineno)) 
const_names.add (name) 
def check_id(name, node) : 
        msg = None 
        if (name in param_names) : 
            msg = "identifier '%s' shadows a parameter" 
else : 
            if (name in const_names) : 
                msg = "identifier '%s' shadows a const expression" 
else : 
                if (name in ident_names) : 
                    msg = "redeclaration of identifier '%s'" 
if (msg is not None) : 
            syntax_error ((msg % name), FakeToken (lexer, node.lineno)) 
ident_names.add (name) 
params = node.parameters 
    for param in params.positional : 
        param_names.add (param.name) 
for param in params.keywords : 
        param_names.add (param.name) 
if params.starparam : 
        param_names.add (const_names.starparam) 
ConstExpr = enaml_ast.ConstExpr 
    for item in node.body : 
        if isinstance (item, ConstExpr) : 
            check_const (item.name, item) 
ChildDef = enaml_ast.ChildDef 
    TemplateInst = enaml_ast.TemplateInst 
    stack = list (reversed (node.body)) 
    while stack : 
        node = stack.pop () 
        if isinstance (node, ChildDef) : 
            if node.identifier : 
                check_id (node.identifier, node) 
stack.extend (reversed (node.body)) 
else : 
            if isinstance (node, TemplateInst) : 
                idents = node.identifiers 
                if (idents is not None) : 
       ...

    
    

    Fix the buggy line: param_names.add (const_names.starparam)
assistant
#Here is Python program to fix the buggy line: param_names.

param_names.add (params.starparam)