Container: Support for children

src/SVG/Elements/Container.tsx

@@ -1,6 +1,8 @@
 import * as React from 'react';
 
 interface IContainerProps {
+  // eslint-disable-next-line no-use-before-define
+  children: Container[],
   x: number,
   y: number,
   width: number,
@@ -9,15 +11,21 @@ interface IContainerProps {
 }
 
 export class Container extends React.Component<IContainerProps> {
-  public render() {
+  public render(): React.ReactNode {
+    const containersElements = this.props.children.map(child => child.render());
+
     return (
-      <rect
-        x={this.props.x}
-        y={this.props.y}
-        width={this.props.width}
-        height={this.props.height}
-        style={this.props.style}
-      />
+      <g>
+        <rect
+          x={this.props.x}
+          y={this.props.y}
+          width={this.props.width}
+          height={this.props.height}
+          style={this.props.style}
+        >
+        </rect>
+        { containersElements }
+      </g>
     );
   }
 }