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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
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56 | * Preload common data by specifying an array of REST API paths that will be preloaded. |
57 | * |
58 | * Filters the array of paths that will be preloaded. |
59 | * |
60 | * @since 5.0.0 |
61 | * |
62 | * @param array $preload_paths Array of paths to preload. |
63 | * @param object $post The post resource data. |
64 | */ |
65 | $preload_paths = apply_filters( 'block_editor_preload_paths', $preload_paths, $post ); |
66 |
|
67 | /* |
68 | * Ensure the global $post remains the same after API data is preloaded. |
69 | * Because API preloading can call the_content and other filters, plugins |
70 | * can unexpectedly modify $post. |
71 | */ |
72 | $backup_global_post = $post; |
73 |
|
74 | $preload_data = array_reduce( |