This file is indexed.

/usr/share/gnome-shell/extensions/gnome-shell-trash-extension/stylesheet.css is in gnome-shell-extension-trash 0.2.0-git20161122.ad29112-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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.trash-scroll-menu-section {
    max-height:450px;
}