Method parseExactlyOneDeclaration

source/python.js:6147–6153

()

                throw new python.Error('Not implemented.');
            }
            parseExactlyOneDeclaration() {
                // const L = this.L;
                const result = this.parseDeclaration();
                // L.nextIf(TK_NEWLINE);
                // L.expect(TK_EOF);
                return result;
            }
            parseArgument(idx, is_return, kwarg_only) {
                const L = this.L;
                const type_parser = this.type_parser;