Code Duplication    Length = 3-3 lines in 2 locations

includes/api/class-wpinv-rest-invoice-controller.php 2 locations

@@ 271-273 (lines=3) @@
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	 */
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	public function create_item_permissions_check( $request ) {
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		if ( ! empty( $request['id'] ) ) {
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			return new WP_Error( 'rest_invoice_exists', __( 'Cannot create existing invoice.', 'invoicing' ), array( 'status' => 400 ) );
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		}
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		$post_type = get_post_type_object( $this->post_type );
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@@ 300-302 (lines=3) @@
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	 */
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	public function create_item( $request ) {
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		if ( ! empty( $request['id'] ) ) {
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			return new WP_Error( 'rest_invoice_exists', __( 'Cannot create existing invoice.', 'invoicing' ), array( 'status' => 400 ) );
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		}
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		$request->set_param( 'context', 'edit' );
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