attrStmt method
A complete attr_stmt.
Implementation
Parser<AttrStatement> attrStmt() =>
([ref0(graphToken) | ref0(nodeToken) | ref0(edgeToken)].toChoiceParser() & ref0(attrList))
.map((result) =>
AttrStatement(AttrTarget.fromValue((result[0] as Token<String>).value), result[1]));