function imports(parts, source) {
	return {
		type: 'ImportDeclaration',
		source: literal(source),
		specifiers: parts.map((p) => ({
			type: 'ImportSpecifier',
			imported: id(p[0]),
			local: id(p[1])
		}))
	};
}
@param {Array<[string, string]>} parts
@param {string} source
@returns {ESTree.ImportDeclaration}