parameters: (function)
return_statement: return vendor is not None and not vendor.group(1) in ['GL', 'API', 'DC']
docstring: Heuristic to see if a function name is consistent with extension function
    naming.
docstring_summary: Heuristic to see if a function name is consistent with extension function
    naming.
docstring_tokens: Heuristic to see if a function name is consistent with extension function naming .
function: def LooksLikeExtensionFunction(function):
    """Heuristic to see if a function name is consistent with extension function
    naming."""
    vendor = re.match(r'\w+?([A-Z][A-Z]+)$', function)
    return vendor is not None and not vendor.group(1) in ['GL', 'API', 'DC']
function_tokens: def LooksLikeExtensionFunction ( function ) : vendor = re . match ( r'\w+?([A-Z][A-Z]+)$' , function ) return vendor is not None and not vendor . group ( 1 ) in [ 'GL' , 'API' , 'DC' ]