The function returns object for all instructions that have any type of call inside it, whether it is an external, internal, library or other type of call.
Example
from glider import *
def query():
functions = Functions().exec(100)
calls_instructions = []
for function in functions:
# List all call instructions in the given functions
for instruction in function.calls_instructions().exec():
calls_instructions.append(instruction)
return calls_instructions