INPUT_OBJECT
Exists is a filter used to determine whether a doc/connection exists in the graph
input ExistsFilter {# gtype is the doc/connection type to be filteredgtype: String!# expression is a CEL expression used to filter connections/nodesexpression: String!# seek to a specific key for paginationseek: String# reverse the resultsreverse: Boolean# search in a specific indexindex: String}