[QGIS-Developer] How can I save a global or project variable that is a reference to an object?

[Luis Eduardo]

HiI am working on an expression that creates an object, I need the reference to the object to be visible by other expressions.

I can create a global, project, variable with:
param='hello'param = QgsExpressionContextUtils.globalScope().variable('param')
But it only allows me to store text or numbers.
How can I store a reference to an object?
Oh how else can I achieve what I am looking for?

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