added whole system from ola4doc

sys/node_modules/postcss/d.ts/warning.d.ts

@@ -0,0 +1,42 @@
+import * as postcss from './postcss';
+import Node from './node';
+export default class Warning implements postcss.Warning {
+    /**
+     * Contains the warning message.
+     */
+    text: string;
+    /**
+     * Returns a string representing the node's type. Possible values are
+     * root, atrule, rule, decl or comment.
+     */
+    type: string;
+    /**
+     * Contains the name of the plugin that created this warning. When you
+     * call Node#warn(), it will fill this property automatically.
+     */
+    plugin: string;
+    /**
+     * The CSS node that caused the warning.
+     */
+    node: Node;
+    /**
+     * The line in the input file with this warning's source.
+     */
+    line: number;
+    /**
+     * Column in the input file with this warning's source.
+     */
+    column: number;
+    /**
+     * Represents a plugin warning. It can be created using Node#warn().
+     */
+    constructor(
+        /**
+         * Contains the warning message.
+         */
+        text: string, options?: postcss.WarningOptions);
+    /**
+     * @returns Error position, message.
+     */
+    toString(): string;
+}