Is in structure? block, Procedure Maker

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a procedure block i suggest is a Is In structure data element , this block will be in the  player procedure/entity data section, the parameters of the block will be Is [Event/target entity] in a [Structure]?. What this does is returns true if the target/event entity is in a given structure, which can be selected with the structure parameter. . this feature could be useful for making a  entity that chases a player until the player is out of a structure.