Method parseSource

src/parsetree/commands/basic.js:424–429

(parser)

    }

    static parseSource(parser) {
        if (!parser.matchAnyToken("of", "from")) {
            parser.raiseExpected('of', 'from');
        }
        return parser.requireElement("expression");
    }

    static parse(parser) {
        if (!parser.matchToken("pick")) return;