PanelSessionItemhas_metadata

gboolean
panel_session_item_has_metadata (
  PanelSessionItem* self,
  const char* key,
  const GVariantType** value_type
)

If the item contains a metadata value for key.

Checks if a value exists for a metadata key and retrieves the GVariantType for that key.

`key`	`const char*`
	The name of the metadata.
	The data is owned by the caller of the function.
	The value is a NUL terminated UTF-8 string.
`value_type`	`GVariantType`
	A location for a `GVariantType` or `NULL`.
	The argument will be set by the function.
	The argument can be set to `NULL`.
	The instance takes ownership of the data, and is responsible for freeing it.

Returns:	`gboolean`
	`TRUE` if `self` contains metadata named `key` and `value_type` is set to the value’s `GVariantType`. Otherwise `FALSE` and `value_type` is unchanged.