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| NodeProto (const string& proto, unsigned line) | NodeProto | 
Parameters:
| protocol | the protocol of the statement. | 
| line | line of configuration where node was created. | 
| DEFINE_VISITABLE () | DEFINE_VISITABLE | 
| bool  is_protocol_statement () | is_protocol_statement | 
[const virtual]
Test whether this is a "protocol" statement.
Returns: true if this is a "protocol" statement.
Reimplemented from Node.
| const string&  proto () | proto | 
[const]
Returns: the protocol being referenced.