Filter whether to display the Sharing Meta Box or not.
sharing_meta_box_show
sharing_meta_box_show-
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filter jetpack_sharing_countsFilter the display of sharing counts next to the sharing buttons.
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filter sharing_enabledFilters the list of enabled Sharing Services.
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filter sharing_servicesFilters the list of available Sharing Services.
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filter sharing_enqueue_scriptsFilter to decide when sharing scripts should be enqueued.
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filter sharing_jsFilter all JavaScript output by the sharing module.
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action post_admin_screen_sharingFires at the bottom of the admin sharing settings screen.
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action sharing_new_service_formFires after the custom sharing service form
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action sharing_global_optionsFires at the end of the sharing global options settings table.
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action sharing_admin_updateFires when updating sharing settings.
Jetpack Developer Resources 